Where in the text did the modification likely take place?

[defaultc0u454s7xjgc]

I have a pdf file that was created on a certain date and from the meta-data it was last modified on a later date.

The pdf is nearly all just text and there is a sentence in the text that has likely been extended and a word deleted. Can I find out whether this sentence was in fact (likely) modified between the creation date and last modification date?

I didn't know whether I could convert the pdf to a more elementry type or view it in another more elementry application to identify whether this sentence was extended and words deleted between the creation date and last modification date?

Don't worry about anyone attempting to conceal the modifications in any way. That's not applicable in this instance.

[Bernd Alheit]

With Acrobat Pro you can compare the modified document with the original document.