• Sublime Core Feed
Medium Severity

Service abuse: Google Calendar notification with callback scam language

Labels

Callback Phishing
Out of band pivot
Social engineering
Natural Language Understanding
Content analysis
Sender analysis

Description

Detects messages sent from Google's legitimate calendar notification service that contain callback scam language, indicating potential abuse of the calendar sharing feature to distribute fraudulent content.

References

No references.

Sublime Security
Created Mar 16th, 2026 • Last updated Mar 16th, 2026
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and sender.email.email == 'calendar-notification@google.com'
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "callback_scam" and .confidence != "low"
)
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