Bidi override in attachment filename — invoice.exe masquerading as invoice.pdf
attachment-rtl-override-in-name
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
An attachment's filename contains a Unicode bidi-control character (U+202E Right-to-Left Override or similar). The canonical attack names a file `invoice\u202Efdp.exe` — the U+202E reverses display order of everything after it, so Gmail/Finder/Explorer render the name as `invoiceexe.pdf`. The user sees a PDF and clicks; the loader runs. Canonical malware-masquerade technique used by Emotet, TrickBot, and every APT loader campaign of the last decade. Legitimate filenames never contain bidi-control codepoints in any language — even Arabic/Hebrew filenames use letter codepoints, not format controls.
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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