/usr/lib/x86_64-linux-gnu/libphonon4qt5.so.4 is in libphonon4qt5-4 4:4.7.1-0ubuntu8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libphonon4qt5.so.4.7.1
/usr/lib/x86_64-linux-gnu/libphonon4qt5.so.4.7.1