Yes, it's possible!

The basic approach would be to use one or more regular expressions to extract the information from the source text.

However, the best way to go about it depends on the format of the source files, could you tell us that? Is it possible for you to provide an example?

If you haven't yet, you should probably start with perlintro and/or Getting Started with Perl to get an overview of how to work with Perl.