It is important to clarify that is not an official file from Pro Evolution Soccer 2012 (PES 2012). It is a file associated with RLD (short for RELOADED ), a warez/piracy group.

If you still play PES 2012 today, buy a cheap used disc or a key from a legitimate reseller. If you must use the crack, only get the rld.dll from a trusted, original scene archive (e.g., a complete RELOADED ISO), never as a standalone DLL from a suspicious download link.