Victor,
I too do a lot of scanning and had a similar need to work with scanned files. You might find that thread interesting to read. Though there were several suggestions which included AppleScript, Peter offered one that worked great without Applescript.
I also shared a macro I created that deals with file names.
Perhaps this will give you some insight into the kinds of things Keyboard Maestro can do with naming files.
As for moving (and renaming files) someone pointed me to a program call Hazel. Noodlesoft – Noodlesoft – Simply Useful Software
At first glance I thought Hazel was cool but could not see a need for it.... I was wrong! I download about 20 bank statements a month and Hazel watches my download folder, looks for set rules which include scanning the content of the downloaded pdfs, renames the files based on content it finds IN THE DOCUMENTS and moves them to locations based on CONTENT IN THE DOCUMENTS. You could do the same kind of thing by scanning all documents to a given folder and then have Hazel do its magic.
. . . Stephen