/wp-admin/admin-ajax.php ranking in google

hi all,
hope you’re all doing well
my problem is that i just setup my blog arabydigital and so when searching for the brand name of my blog
“arabydigital” (no spaces) if you go to the second page you’ll find that this link is ranking
https://www.arabydigital.com/wp-admin/admin-ajax.php
why is that happening ?
i was using Groovy theme but i want it to make sure that the problem is not from the theme i changed it back to twenty twelve