This file is indexed.

/etc/cron.daily/pam_shield is in libpam-shield 0.9.6-1.1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#! /bin/sh

if [ -x /usr/sbin/shield-purge ]; then /usr/sbin/shield-purge -c /etc/security/shield.conf
fi