/usr/lib/x86_64-linux-gnu/libHX.so is in libhx-dev 3.22-1+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libHX.so.28.3.0
/usr/lib/x86_64-linux-gnu/libHX.so.28.3.0