/usr/share/doc/libpam-systemd/changelog.Debian.gz is in libpam-systemd 229-4ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpam-systemd/../libsystemd0/changelog.Debian.gz
/usr/share/doc/libpam-systemd/../libsystemd0/changelog.Debian.gz