/usr/lib/x86_64-linux-gnu/libxalanMsg.so is in libxalan-c-dev 1.11-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxalanMsg.so.111.0
/usr/lib/x86_64-linux-gnu/libxalanMsg.so.111.0