Hey guys, I'm still following this thread and still interested in a solution. As 0rsted said, we don't really need to break the encryption (although that would of course be the ideal solution), all we need is an automated processes of flipping through the already decrypted pages, screen capping all of them and then bundling all of the caps in a pdf.
The problem is I don't know how to program and thus can't automate the process.
Happy new year.