/usr/lib/xnbd/libxnbd_internal.so is in xnbd-common 0.2.0~rc2-hg1-abf8cc7a1ab0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/xnbd/libxnbd_internal.so.0.0.0
/usr/lib/xnbd/libxnbd_internal.so.0.0.0