[WD] PDF Data Extraction and saving file

Hello to all

I have about 1000 pdf files and each filename is like "CU2018_1.pdf", "CU2018_2.pdf" and so on for the rest.
Each filename has in a specific position in the 1st page of each pdf, a fiscal code to recognize the person name.
What i would try to do is to read this fiscal code and save (or rename) the file using this information, like SPNGNN56T08G015-2018.pdf.
Of course the fiscal code (i.e. SPNGNN56T08G015D) is printed at the same position in each pdf file.

Is there a library or some tools that allow me to extract the fiscal code passing the coordinates where it is located inside the pdf file??

Thanks in advance
Gianni