MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment
T1027 Obfuscated Files or Information
This PDF file contains embedded JavaScript and utilizes obfuscated filters (ASCIIHexDecode and ASCII85Decode) which are commonly used to hide malicious code. The presence of JavaScript actions and streams, combined with ClamAV's detection of an obfuscated name object, strongly indicates that this file is designed to execute a secondary payload. The exact nature of the payload is not discernible from the provided evidence, but the techniques used are typical for PDF-based malware delivery.
Heuristics 5
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ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTIONClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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