Could not find how to do it with qpdf or pdftk or even a gui tool.
Edit:
Solution pdftk A=oldpdf.pdf cat A output newpdf.pdf
This removes all metadata and also the attachments.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
I am talking about removing them from pdf. For extracting them this works
pdftk [pdf_file.pdf] unpack_files.I've used LibreOffice Draw before to remove content from PDF files without reprinting
Yes but in my case the pdf file is big and I libreoffice draw hangs. Also i found another solution (added that to post).
Oh in that case. Let me look up an open source tool I’ve used for PDFs before. It might be able to do it.
It’s called pdfsam.
I’m not sure if it can do what you are asking, but I think it will do the trick.
You might be able to use the convert function of ffmpeg to extract the pages as png and then recreate a new pdf from the pngs that were extracted, but this may not work for your specific file.