I'd suggest you would want something that would generate html files based on the structure of your pdfs - allowing you to jump to different parts of the documentation. Hopefully the structure of the doc (contents/headers etc) are set up in a way that would allow a clean conversion!
there's a free one here:
http://www.adobe.com/products/acrobat/access_onlinetools.html
but it might not accept files that large, and may just return a single html page - what you want is a tool that reads the contents/headers and creates a group of html pages that represent the content.
you could then take that group of html files and turn that into a SCORM object, but you could just upload the group of files into your moodle site, and use the "link to a file or website" option to select the main file created by the process.
someone else here might have an idea on a product that might do this for you!
good luck!