If you are interested in the actual progress of PS4 emulation, follow these credible, open-source projects. None of these are currently capable of running major AAA games at full speed, but they are the only real efforts:
If an emulator doesn't have a public GitHub repository with active code contributions, it is likely fake. Download PS4 Emulator PCSX4
Files associated with PCSX4 are frequently flagged by antivirus software as Trojans or Adware . Legitimate PS4 Emulation Projects If you are interested in the actual progress