Hello guys, I want to advise you one site that I have been using for more than a year. I work there all the time with documents and various PDF files, so I leave a link directly to the page
https://pdflike.com/split-pdf where you can split the file. They have a very cool and versatile program for working with PDF, you can edit, read, merge files in just a few seconds. So if you are interested, please follow the link and try the free version!