/usr/lib/x86_64-linux-gnu/libsamba-passdb.so.0 is in samba-libs 2:4.3.8+dfsg-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsamba-passdb.so.0.24.1
/usr/lib/x86_64-linux-gnu/libsamba-passdb.so.0.24.1