This is the latest version of Arnold Render for Cinema 4D 2024. (Version 4.6.5)
I downloaded it from the official Autodesk website, so the installer is definitely virus free.
To make it work, simply replace the ai.dll file with the one provided.
Download Links:-
Arnold_Render_4.6.5_for_Cinema_4D_2024_Win_x64.rar
Mirror :-
https://nitro.download/view/382E31AF94D528E/Arnold_Render_4.6.5_for_Cinema_4D_2024_Win_x64.rar