pdf-Recover

pdf-Recover disables restricted operations on PDF files instantly. It removes the master password and security settings with one click. If you can't remember your password, pdf-Recover will allow resetting encrypted files - and providing without any restrictions. The software removes the 'master password' of a PDF and creates a copy of your file without any limitations, that means you can edit, copy, and print texts and images from this document.

Limitations:

Watermark on output