/usr/lib/x86_64-linux-gnu/libxmlada_sax.so is in libxmlada-sax7-dev 17.1.2017-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxmlada_sax.so.4.6.2016
/usr/lib/x86_64-linux-gnu/libxmlada_sax.so.4.6.2016