/usr/share/igtf-policy/classic/IRAN-GRID-GCG-G2.crl_url is in igtf-policy-classic 1.79-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
http://irangrid.ipm.ac.ir/pki/pub/crl/cacrl.der