This can be done using a PDF to XML converter service. There are a few out there. Basically they map your PDFs (this is a manual process done by the service) and then after that you can email the PDFs and get XML files back.
I know that ChimpKey http://chimpkey.com is used quite a bit out there - they have been around the longest and are the one I hear about the most.
There are others but I can't remember the names.
Give those a look and hopefully it will be what you are looking for.