/usr/lib/x86_64-linux-gnu/libpoppler.so.73 is in libpoppler73 0.62.0-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpoppler.so.73.0.0
/usr/lib/x86_64-linux-gnu/libpoppler.so.73.0.0