Map with 500 pdfs. How to make a new file with only the first pages, new file with second pages etc.

Hi,

A client confronted me with the next question:

I have a map with 500 pdf's in it.

Is it possible to make a new file with only the first page of each pdf?

After that to make a new file with only the second page of each pdf?

And after that the third?

Etc.

Is that possible with an action?

Or are there scripts for?

I couldn't find them.

I use an iMac with Acrobat XI.

Any help is very welcome.

Thanks in advance.

Bornholm