Many of these downloads include custom activation scripts (KMS emulators). These require disabling Windows Defender and running unsigned executables — a classic vector for persistent backdoors.
The string swdvd5officeprofessionalplus2016w64english refers to the of Office 2016 Professional Plus. It is a "perpetual" release intended for corporate deployment, featuring the full suite of Office tools including Skype for Business and Access. While functional, it is approaching the end of its official support lifecycle. swdvd5officeprofessionalplus2016w64english