Are there any virtual printer drivers for Mac that allow you to print something to a high quality JPEG (150-300dpi) in the same way you can print a PDF?

There’s no way you could open the PDF with, say, InDesign or Illustrator, right? Even if you just downloaded a trial version?

Unfortunately that doesn’t work, I get asked for a password which I don’t have…

If I screen capture it would just be 72dpi, which isn’t really good enough unless there is some kind of higher res screen capture software, but I guess that’s unlikely…

@AlexTrup Now I’m confused… you don’t have the password, but you can edit it? In what, Reader?

What about the old fashioned way… print it out, then scan in at a high resolution, then add your jpeg and print to PDF?

Umm I assume you are not on a mac as you can generally print to a printer and then choose pdf as an option which would save it to another pdf file. However, given the permissions settings you say it has, it may not allow that as well.

Your only real options are to get the password from the author or… it is possible to crack passwords of such documents as the encryption is generally not that secure for document passwords. I leave it as an exercise for you to find out how to crack it.