/usr/lib/x86_64-linux-gnu/libIceBox.so.35 is in libicebox35 3.5.1-5.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libIceBox.so.3.5.1
/usr/lib/x86_64-linux-gnu/libIceBox.so.3.5.1