// REFERENCE

Flash SWF signature

Signature (hex): 46 57 53 / 43 57 53 (FWS/CWS) High risk

A Flash (.swf) starts with FWS (uncompressed) or CWS (compressed). Flash is dead and riddled with vulnerabilities: any SWF today is suspicious.

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Signatures verifiable with CyberEscudo's magic-bytes identifier. Educational content.