Most "best" versions of X-Force found on the open web are bundled with "backdoors." These allow hackers to monitor your keystrokes or steal personal data.
: Better integration for importing models from other Autodesk products like Inventor. Content Explorer
AutoCAD 2012 is a version of the popular computer-aided design (CAD) software developed by Autodesk. It was released in March 2011 and is used for drafting, design, and documentation. AutoCAD 2012 introduced several new features, including a new user interface, enhanced annotation and drafting tools, and improved 3D modeling capabilities.
These are "AutoCAD clones" that offer perpetual licenses at a fraction of the cost, with interfaces almost identical to AutoCAD 2012. Final Verdict
The term "xforce" refers to a group or tool known for creating cracks and activators for Autodesk software, including AutoCAD. The "x64.exe" part indicates that it is a 64-bit executable file, likely a crack or activator for the 64-bit version of AutoCAD 2012.