/usr/lib/x86_64-linux-gnu/heimdal/libkafs.so is in heimdal-multidev 7.5.0+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/heimdal/../libkafs.so.0.5.1
/usr/lib/x86_64-linux-gnu/heimdal/../libkafs.so.0.5.1