From: http://en.wikipedia.org/wiki/Evince
"Evince used to obey the DRM restrictions of PDF files, which may prevent copying, printing, or converting some PDF files, however this has been made optional, and turned off by default in gconf."
A little googling led to this: http://archive.today/uKxXs
"2007-07-04 at 04:38 Donald Hellen wrote:
Does Evince allow you to at least read DRM protected ebooks, if not print them? What will Evince allow you to do with these DRM protected PDF files?
cough gconf-editor cough Enable /apps/evince/override_restrictions