extract text from pdf and create multiple pdf

I have to create a Java application that reads the text from a pdf (which has many pages) on a specific row and column. Depending on the text content then I have to do a spli tof the pdf. For example, a 10 page pdf can be divided into 3 pdfs, one of which is 5 pages, another 2 pages and another 3 pages.

I was looking at iText but I have some difficulties, can it be the best solution? Where can I take an example from? Can the PDFBox library be valid for this type of application?