Instead, I can help you in two ethical ways:
Summary: DFX Audio Enhancer is a Windows audio processing application that enhances sound playback by applying algorithms such as 3D surround, fidelity restoration, dynamic boost, and hyperbass. The referenced package appears to be a compressed RAR archive named "dfx audio enhancer v12023.rar" — likely containing the installer, optional crack/patch, keygen, or portable build depending on source.
DFX was acquired and reborn as (free + Pro version). The "v12023" you're seeing is likely a mislabeled old version. Instead of hunting risky .rar files, download the official FxSound 2.0.