/usr/lib/x86_64-linux-gnu/libdxflib.so is in libdxflib-dev 2.5.0.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdxflib-2.5.0.0.so
/usr/lib/x86_64-linux-gnu/libdxflib-2.5.0.0.so