Manipulate .PDF File

I have a .PDF file which contains 10 pages. (Page 1 to 10)


I need to split this file into 5 smaller .PDF files.
Page1.PDF to Page5.PDF


My 10 pages .PDF file has to become 5 separate 2 pages .PDF file.

Is there a quick way to do this?

Page 1-2 will become Page1.PDF
Page 3-4 will become Page3.PDF
an so on ..

Thanks.