move pdf through clipboard
From the man page of pbcopy 


  pbcopy  takes the standard input and places it in the specified
  pasteboard. If no pasteboard is specified, the general pasteboard will
  be used by
         default.  The input is placed in the pasteboard as plain text data unless it begins with the Encapsulated PostScript (EPS)  file 
  header  or  the
         Rich Text Format (RTF) file header, in which case it is placed in the pasteboard as one of those data types.


So from this it would seem that only documents with RTF format or EPS format can be copied and pasted from these commands. 

Finder does support copy and pasting files however, so cmd c, and cmd v, will copy and paste files in finder.