CSS hidden text salting — 3+ concealment techniques (zero-font, display:none, opacity:0, etc.)
css-hidden-text-salting
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
CSS hidden text salting / zero-font attack (Cisco Talos 2025). The HTML body uses 3+ distinct CSS concealment techniques simultaneously — font-size:0, display:none, opacity:0, visibility:hidden, max-height:0, color:transparent, or zero-width overflow:hidden containers. Attackers inject hidden text blocks with benign words to dilute classifier confidence while the VISIBLE text is the phishing payload. A single display:none is normal (newsletter preheaders); 3+ simultaneous techniques is a strong classifier-poisoning fingerprint.
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 2,143+ 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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