Is there a way to upon dropping a .pdf document into a container within my filemaker file, select all or pull the text from that .pdf and send it to a text box?

There are basically 2 types of PDFs, 1) the text/vector based one; with the subcategory of X-PDF or was it PDF-X, in which is already OCRed by the scanner, and 2) the scanned pixel based ones, for case number 1 I'd use pdftotext from poppler-utils linux package( probably available from brew for Mac http://brew.sh or you can compile from source: http://poppler.freedesktop.org/ )for number 2, I would use imagemagick with tesseract or OCRopus.