Inbox Infiltration: The File Type You're Overlooking
Varonis, Thursday, October 16th, 2025
Discover how attackers use SVG files to hide malicious JavaScript in images, and learn how to defend against these evolving phishing threats.
Phishing tactics have taken a creative turn with the abuse of SVG files, turning innocent-looking images into vehicles for high-impact attacks.
A simple 'invoice' attachment can conceal sophisticated JavaScript, obfuscated in CDATA blocks, that decodes gibberish strings via XOR and launches redirects or overlays the instant someone opens it in a browser. This kind of attack is especially challenging because it lives where most security tools don't look - in code executed by an image.
In this blog, we'll unpack SVG threats, why attackers love them, and how Varonis Interceptor can help combat SVG-based attacks.