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Readme.txt
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Readme.txt
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PdfStream Dumper v.9.3xx
Developer: David Zimmer <dzzie@yahoo.com>
Homepage: http://sandsprite.com/blogs/index.php?uid=7&pid=57
Capabilities
--------------------------------------
This tool is designed to allow you to parse and analyze PDF files in their raw format.
It includes allot of features like being able to:
- view all pdf objects
- view deflated streams
- view stream details such as file offsets, header, etc
- save raw and deflated data
- decompile Flash ActionScript 3 files with AS3 Sorcerer (Trial included)
- supports filters: FlateDecode, RunLengthDecode, ASCIIHEXDecode,
ASCII85Decode, LZWDecode, FaxDecode, JBIG2Decode
- supports filter chaining (ie multiple filters applied to same stream)
- supports unescaping encoded pdf headers
- search streams for strings
- perform various types of manual escapes on selected data portions.
- scan for functions which contain pdf exploits (dumb scan)
- format javascript using js beautifier (see credits at end)
- view streams as hex dumps
- zlib compress/decompress arbitrary files
- replace/update pdf streams with your own data
- basic javascript interface so you can execute parts of embedded scripts
- integrated UI for sclog shellcode analysis tool from idefense. (seperate install)
- integrated UI for sctest shellcode analysis tool using libemu. (included in install)
- js ui also has access to a toolbox class to do a bunch of things (dump to file etc)
- decrypt encrypted pdf files (uses iTextSharp)
- basic ability to rename obsfuscated javascript functions, arguments, and variables
- can hide: header only streams, duplicate streams (by crc), selected streams
This tool is useful for many things, it is free and open source.
It does not parse pdfs fully, it basically just extracts obj streams and headers.
I dont want to try to make it to smart, few assumptions means fewer places
to try to break its analysis by malicious pdfs. Even if this means you have
to manuallly apply more smarts when looking at it.
I am trying to keep this tool pretty raw so you can see their tricks yet
still have the tools on hand to bypass them.
Decryption app is in C# using iTextSharp. It copies the contents of the owner
password protected pdf into a new file and unencrypts it as it does so.
Notes:
-----------------------------------------
Some filters and the pdf decrypt features are optional
they require .NET 2.0 (or above) installed. The app should run fine without
them, just wont support these extra features.
sclog (iDefense) and scdbg (libemu) shellcode analysis tools are included with the installer.
-----> sclog runs LIVE SHELLCODE so <----
-----> ONLY USE IT ON A TEST MACHINE ! <---- (duh)
scdbg is powered by libemu and analyzes shellcode in an emulation envirnoment
so should be safe(r).
If you find a pdf which pdfstreamdumper cant deal with, feel free to mail
it in a password protected zip file to me at dzzie@yahoo.com
Command line options:
--------------------------------------------
PdfStreamDumper currently only supports one command line option which is /extract
usage: pdfstreamdumper "c:\blah blah\bad.pdf" /extract "c:\some folder"
When run in this mode, it will load the pdf file (interface visible) extract all of
of the streams it could process without error to the folder specified and then exit.
The folder need not exist, it will build the path to it if it can. The files will be
named stream_x.ext where ext is the relevant file type extension if it can be determined.
Hot Keys and other Behaviors:
---------------------------
main form left hand listview supports coloring based on stream types, use mouseover to
see tooltip, or use Tools->About lv Colors to see color map info.
this listview also supports some hot keys.
Ctrl-a = select all
ctrl-n = select none
ctrl-d = deleted selected (no changes are made to the pdf)
ctrl-i = invert selection
these are useful with the listview right click menu options to save streams because these
menu items work on all streams in the listview itself.
also the Search menu item will auto select all the matches it finds in this main listview too
in case you want to select all fonts and then save them the streams you are only a couple clicks
away regardless of how many are in the file.
once you trim out the list, you can reload it anytime by clicking the load button again.
also check out the Tools->options menu where you can auto hide duplicate streams, and header only
streams. (you probably wan to view headers by default)
Example:
--------------------
How do I extract all of the unique fonts in a decompressed format from a
pdf quickly if the pdf has hundreds of objects?
1) make sure the tools->options->hide duplicate streams option is set
2) click the search_for->TTF Fonts This will select all fonts in main list.
3) right click on one of the selected fonts in the main list (on left)
and choose the menu option to hide unselected
4) right click on main list (which only contains the fonts now) and choose
save all decompressed streams
To reload all of the streams again, just click the load button to start over.
Source Code and projects
---------------------------------------
Source code is included with this installer.
You will find a \source directory on the start menu entry with the
project files.
latest source can always be pulled from github:
pdfstreamdumper https://github.com/dzzie/pdfstreamdumper
sclog https://github.com/dzzie/sclog
scdbg
- vc/win32 https://github.com/dzzie/VS_LIBEMU
- gcc/*nix https://github.com/dzzie/SCDBG
Credits:
---------------------------
Original stream parser was written by by VBboy136 - 12/9/2008
http://www.codeproject.com/KB/DLL/PDF2TXTVB.aspx
Scintilla by Neil Hodgson [neilh@scintilla.org]
http://www.scintilla.org/
ScintillaVB by Stu Collier
http://www.ceditmx.com/software/scintilla-vb/
AS3 Sorcerer Trial provided courtesy of Manitu Group.
http://www.as3sorcerer.com/
JS Beautify by Einar Lielmanis, <einar@jsbeautifier.org>_
conversion to Javascript code by Vital, <vital76@gmail.com>
http://jsbeautifier.org/
zlib.dll by Jean-loup Gailly and Mark Adler
http://www.zlib.net/
CRC32 code by Steve McMahon
http://www.vbaccelerator.com/home/vb/code/libraries/CRC32/article.asp
iTextDecode/iTextFilters use iTextSharp by Bruno Lowagie and Paulo Soares
http://itextpdf.com/terms-of-use/index.php
olly.dll GPL code Copyright (C) 2001 Oleh Yuschuk.
http://home.t-online.de/home/Ollydbg/
http://sandsprite.com/CodeStuff/olly_dll.html
MuPDF is released under GPL and Copyright 2006-2012 Artifex Software, Inc.
http://www.mupdf.com/
CCTIFaxDecoder copyright Sun MicroSystems and intarsys consulting GmbH.
http://java.net/projects/pdf-renderer/
libemu written by Paul Baecher and Markus Koetter 2007.
http://libemu.carnivore.it/about.html
scdbg homepage
http://sandsprite.com/blogs/index.php?uid=7&pid=152
sclog is a tool i wrote back at iDefense (no longer available on their site)
https://github.com/dzzie/sclog
Interface by dzzie@yahoo.com
http://sandsprite.com
WinGraphViz OOD Tsen oodtsen@gmail.com
http://wingraphviz.sourceforge.net/wingraphviz/index.htm
GraphViz - AT&T Labs
http://graphviz.org/
Other thanks to Didier Stevens for the info on his blog on tags and encodings.
http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways
HexEd hexeditor control codebase by Rang3r
http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=34729&lngWId=1
Microsoft Script Decoder (c)2000/2001 MrBrownstone
http://www.virtualconspiracy.com/scrdec.html