/usr/share/man/man8/mount.vmhgfs.8.gz is in open-vm-tools 2:9.4.0-1280544-5ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man8/vmware-hgfsmounter.8.gz
/usr/share/man/man8/vmware-hgfsmounter.8.gz