Trojan.Spoofive!html is a generic detection for .html files infected by a malicious proxy that uses ARP spoofing to redirect Internet traffic.

An invisible iframe is inserted at the beginning of an infected .html file, which references a malicious Web site. When the infected .html file is opened in a Web browser it may download and execute potentially malicious files. 

Category: Trojan

Risk Level: Low

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Source: Symantec