As with any unofficial "fix" or crack from third-party sources, there is an inherent risk of malware or unwanted scripts bundled within the .rar file.
The filename "F1.2013.V1.0.Steamworks.Fix-RVTFiX.rar" suggests that it is a rar archive containing a fix for the Steamworks version of "F1 2013". Steamworks is a toolset provided by Valve Corporation that game developers use to integrate their games with Steam, a popular digital distribution platform for PC gaming. A "fix" like this often implies a patch or crack that might resolve issues with the game, such as compatibility problems, crashes, or in some cases, allow the game to run without official Steam services.
: Includes Career mode, Split-screen, and Online Multiplayer.