No problem at all. If you really determined to avoid using any 3rd-party tool, you can always develop a 1st-party tool, because full standard is published under ISO 32000-1:2008. Unfortunately, obtaining the copy of the document is not free of charge.
You can also obtain the description of the standard from Adobe site. In particular, please see
http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/pdf_reference_1-7.pdf[
^].
For further detail and good collection of references, please see:
Portable Document Format — Wikipedia, the free encyclopedia[
^].
Can you do this work? I doubt it. Nevertheless, there is a good bunch of 3rd-party PDF tools, so a number of teams successfully solved such problems (and the usability of good 3rd-party PDF viewers much better then dreaded Adobe). Anyway, be realistic and carefully examine the feasibility of such project. :-)
—SA