/usr/lib/x86_64-linux-gnu/libkrb5.so.3 is in libkrb5-3 1.12+dfsg-2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libkrb5.so.3.3
/usr/lib/x86_64-linux-gnu/libkrb5.so.3.3