There is no single famous film or viral video behind this demonic whisper; it belongs to the wider pool of horror sound effects shared on soundboards and used in short-form edits, pranks and Halloween content. Low, distorted whispers have long been a shortcut for possession, haunting and unseen evil in horror, because the voice sounds human yet wrong. That familiarity keeps it useful today, especially in four-second clips where a creator needs instant dread without dialogue, explanation or a long build-up.