A PDFBox front-end for Windows that adds/extracts/removes attachments from PDFs.
A Windows quickstart installer is available on the project release page. A binary is included in this repo. The solution should open and run from Visual Studio 2017 or later and relies on the PDFBox NuGet package only.
This project is in part inspired by Abe Jellinek's PDFData project which implements more attachment methods. PDFAttacher is focused on simplicity and reliability on Windows, to allow testing with users.
This software is licensed under an MIT license. Use it for whatever you like. It relies on PDFBox which is available under the Apache License v2.0 -- so you should check that out too.
PDF with attachments in PDF Attacher.
The same file opened in Adobe Acrobat Reader DC on Windows.