/usr/lib/x86_64-linux-gnu/libmarblewidget-qt5.so.28 is in libmarblewidget-qt5-28 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmarblewidget-qt5.so.0.28.0