Not a recent release but version 2.02 of the PDF Toolkit is available at PDF Labs.
I could rant about PDF as a format but that won’t change the necessity of processing them.
The PDF Toolkit has the potential to take some of the pain out of that task.
BTW, as of today, the Pro version is only $3.99 and the proceeds support development of the GPL PDFtk.
Not a bad investment.