Be more clear that we dislike certain PDF templates

modules/exploits/windows/fileformat/adobe_pdf_embedded_exe.rb

@@ -71,21 +71,32 @@ class Metasploit3 < Msf::Exploit::Remote
 
 		print_status("Reading in '#{file_name}'...")
 		stream = read_pdf()
-		print_status("Parsing '#{file_name}'...")
-		pdf_objects = parse_pdf(stream)
-		print_status("Parsing Successful.")
-		xref_trailers 	= pdf_objects[0]
-		trailers	= pdf_objects[1]
-		startxrefs	= pdf_objects[2]
-		root_obj	= pdf_objects[3]
 
 		begin
+			print_status("Parsing '#{file_name}'...")
+			pdf_objects      = parse_pdf(stream)
+			xref_trailers    = pdf_objects[0]
+			trailers         = pdf_objects[1]
+			startxrefs       = pdf_objects[2]
+			root_obj         = pdf_objects[3]
+
 			output = basic_social_engineering_exploit(xref_trailers,root_obj,stream,trailers,file_name,exe_name,startxrefs.last)
 
-			print_status("Creating '#{datastore['FILENAME']}' file...")
+			print_status("Parsing Successful. Creating '#{datastore['FILENAME']}' file...")
 			file_create(output)
 		rescue KeyError => e
-			print_error("Incompatible PDF structure: #{e.message}. Please try a different PDF.")
+			# Lazy fix:
+			# Similar to the problem with NoMethod -- something we need is missing in the PDF.
+			# But really what happens is the module trusts the PDF too much.
+			print_error("Sorry, I'm picky. Incompatible PDF structure: #{e.message}. Please try a different PDF template.")
+			elog("Call stack:\n#{$!.backtrace.join("\n")}")
+		rescue NoMethodError => e
+			# Lazy fix:
+			# When a NoMethod error is hit, that means that something in the PDF is actually missing,
+			# so we can't parse it. If we can't parse it properly, then we can't garantee the exploit
+			# will work, either.  So we might as well just reject it.
+			print_error("Sorry, I'm picky. Incompatible PDF structure, please try a different PDF template.")
+			elog("Call stack:\n#{$!.backtrace.join("\n")}")
 		end
 	end
 
@@ -240,8 +251,6 @@ class Metasploit3 < Msf::Exploit::Remote
 			end
 		end
 
-
-
 		pages_obj = catalog.match(/Pages (\d+ \d) R/m)[1]
 		pages = parse_object(xref_trailers,pages_obj,stream)