/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so is in libguac-client-vnc0 0.9.9-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libguac-client-vnc.so.0.0.0
/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so.0.0.0