/usr/lib/hylafax/libhylafax-6.0.so is in hylafax-client 3:6.0.6-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/hylafax/libhylafax-6.0.so.6
/usr/lib/hylafax/libhylafax-6.0.so.6