not aware of any OOTB implementation. In general, you may need to write your own java code to accomplish this with the help of some open source libiraries (e.g., pdfbox, pdbclown). Pega does ship pdfbox 1.8.8, but does not seem to be used anywhere, but I am not sure pdfbox has the java api to do what you need, check the website for details: https://pdfbox.apache.org/index.html. If you have to use java, suggest you build the application code outside pega, and then you can easily move the code to some activities with java step.