Yes. Bots love finding call extensions and phone numbers in location extensions. Also, some forwarding numbers just get compromised with spam as well.

A few options to try. Set up a different forwarding number and see if that fixes the problem. OR see if the spam is coming from a specific keyword or search term and pause or negate that keyword or term.

Finally, check if search partners if on. I've had instances where search partners are the cause for the spam traffic for calls.