I want to batch process scanned pdfs, ocr a part of the pdf and then save the file with the OCR'd text as name of file

Here is the scenario that i'm trying to solve.

1. Folder of 300+ scanned PDFs see photo 1
2. Open each PDF
3. OCR the scan and recognise  a  section of the pdf ( eg license plate of vehicle) See Photo 2
4. save the PDF as a new file with the filename using the OCR text (eg. Licence plate of Vehicle) See Photo 3
5. Repeat on 2nd file until end of all files have been saved

Photo 1

Photo 2

Photo 3