Fake Grammarly Premium renewal phishing — impersonates Grammarly with subscription-expired or payment-failed urgency + renew CTA at a non-grammarly.com host. Cofense 2025-2026; Proofpoint Q1 2026.
fake-grammarly-premium-renewal-lure
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
Phishing emails impersonating Grammarly claiming a Premium or Business subscription has expired or a payment has failed, directing victims to a fake renewal page that harvests login credentials and payment card data. Three-part detection: (1) Grammarly Premium / Business / subscription language, (2) expired / payment-failed / cancelled urgency, (3) renew / restore / billing-update CTA with off-grammarly.com link. Cofense 2025-2026 documented Grammarly impersonation campaigns targeting knowledge workers and writing teams; Proofpoint Q1 2026 confirmed active campaigns. High-value phishing target: Grammarly serves 30M+ daily active users, with Premium users relying on the tool for professional writing.
False-positive guard
Every signal in Gorganizer feeds a multi-module score — never a sole verdict. This is a threat-tier signal — it adds a strong contribution to the trash score. The full pipeline still requires convergence across multiple modules + a margin over the safety floor before deletion happens, and Gmail's trash (30-day recovery) is always used — never permanent delete.
About the scoring engine
Gorganizer's scoring engine emits over 1,800 signals across six modules — headers, sender, subject, body, attachments, and structural metadata. Every email is scored by every module independently; the final verdict requires multiple modules to agree and the trash score to beat the safety floor by a margin.
Sacred safety guards — never delete starred emails, replies, calendar invites, receipts/invoices, or attachments — apply unconditionally regardless of any signal.
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