We have relased a new version of our PDF signature library! IAIK [CP]AdES 2.3 has been updated to support PDFBox version 2.0. Furthermore it provides countermeasures against recently posted signature validation attacks that try to bypass the integrity and authenticity protection of PDF signatures (https://www.pdf-insecurity.org/index.html): Universal Signature Forgery(USF), Incremental Saving Attack (ISA), and Signature Wrapping Attack (SWA).
See the IAIK [CP]AdES product page and visit our download center to get the new version.
Kind regards,
Your SIC/IAIK Java Security Team!