This file is indexed.

/usr/lib/x86_64-linux-gnu/libsylph-0.so.1 is in sylpheed 3.5.1-1ubuntu3.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/libsylph-0.so.1.2.0