Split PDF's into multiple parts
Drupal can't out of the box. Doesn't mean YOU couldnt in PHP :) (i think)

I've written PDFs on-the-fly using Ruby and mucked with it in PHP soooo ....

Using Fields in Drupal you could supply an File Upload widget for PDFs.

Then write a module to process the file on upload,

Using PHP's built in PDFs functions like:

http://php.net/manual/en/function.pdf-get-pdi-value.php

simply get the numbers of pages, and then retrieve each page's content and make a new simple 1 page PDF out of it. Then save the file and FID to another Field of files with unlimited values for any number of pages .... It sounds doable for most PDFs (not necessarily crappy built non-standard PDFs) -- but definately some work .... :)