From thehackernews.com
Looking for ways to unlock and read the content of an encrypted PDF without knowing the password?
Well, that’s now possible, sort of—thanks to a novel set of attacking techniques that could allow attackers to access the entire content of a password-protected or encrypted PDF file, but under some specific circumstances.
Dubbed PDFex, the new set of techniques includes two classes of attacks that take advantage of security weaknesses in the standard encryption protection built into the Portable Document Format, better known as PDF.