Auto rename by file content.

You should consider trying/buying the AutoSplit plug-in:

https://evermap.com/AutoSplit.asp

There are no built-in tools in Acrobat for doing it. It can be achieved (if it's possible to identify the content in question) using a script, but even then it won't be able to rename the files, just save a copy under the new name.
If you want to really rename them then a stand-alone tool needs to be used, or maybe a plugin.

Let me move this to the Acrobat forum for you, which is the appropriate forum for your question.

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