Like a shadow lurking in the fog, this silent call that suddenly utters your surname feels off and invasive. It's a classic red flag for potential scams or harassment, where callers test if they've reached the right person before pitching something shady. Hang up immediately, as you did—never engage or share info. Block the number on your phone to stop repeats, and report it to authorities like your local telecom regulator or apps such as Truecaller. Enable call screening features on your device for extra protection, and stay vigilant against unsolicited calls that know personal details; they often fish for more.