Medium Severity

Service abuse: Calendly callback scam detection

Labels

Callback Phishing
Social engineering
Impersonation: Brand
Natural Language Understanding
Sender analysis

Description

Detects inbound messages from Calendly's notification system that contain callback scam content, as identified through natural language processing with medium or high confidence levels.

References

No references.

Sublime Security
Created May 21st, 2026 • Last updated May 21st, 2026
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and sender.email.email == "no-reply@calendly.com"
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "callback_scam" and .confidence != "low"
)
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