printing a PDF from Forms

I have a special requirement of accessing PDF file from PL/SQL. The requirement is like this:

There is one report prints one page. There are some pages in PDF file. We
have to select only a few pages corressponds to the first page printed
(Oracle) and print it. For example:

Say page 1 will be printed using oracle report writer . Pages from 2 - 5
will have to be printed from PDF file. There is a key field (matches the key
field in Oracle) in PDF file . We have to select the pages based on this
key. ie. select those pages from PDF files where ever this key is appearing
and print those pages..just print without formatting. Please thro' some assistance.

Thanks.