Just get the professional version of Acrobat. Even if the PDF is an image, you can do character recognition, and save it as a text based PDF. If it already is text based, you can copy and past from a PDF even with the just the reader.
The character recognition is not perfect, so you have to check what you copy.
I did that sort of thing just last week for a monthly status report I was writing. Someone had generated the PDF by scanning in the document, so as to capture the signature(s). There's not really a need to do that either, you can just capture the signature page as an image, and then replace the text based page with that. (you could do the CR thing on that page, but I would not advise it).
“Just get the professional version of Acrobat.”
Easy for you to say, that thing costs over a hundred bucks, my wife already thinks I spend to much on this computer as it is.
This is the conversation:
Self: Honey, I need to spend a hundred dollars on software to win arguments on Free Republic.
Wife: That *&^% computer!