Within a pdf it is possible to change page numbering, so the first page would be page 5, etc.
(This has nothing to do with headers and footers, i'm speaking strictly about the page numbers as they appear in the pdf toolbar)
Is it possible to control those numbers with EvoPDF?
Yes, apparently with EVOPDF v5 you can set the number to be displayed on the page using the PageNumberingStartIndex
property of the PdfHeaderOptions object (same for Footers). I don't know of any examples using this.