/usr/lib/x86_64-linux-gnu/libsmbclient.so.0 is in libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsmbclient.so.0.2.3
/usr/lib/x86_64-linux-gnu/libsmbclient.so.0.2.3