A PDF can include attachments like audio, fonts, images, text file, videos, etc. If you want to extract such files/attachments from a PDF, then this post can help you. Though you can use some PDF ...

Q: I'm part of a group of 80 people who every week receive an e-mail with an Adobe PDF file attachment. But when I receive the e-mail, the PDF has been converted to a Winmail.dat file that my e-mail ...

Given that it's from Google, it's not surprising that Gmail has a powerful search feature. But until now, if your email had a third-party attachment, say a PDF or Word doc, it couldn't index that text ...