MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 Command and Scripting Interpreter: PowerShell
T1204.002 Malicious File: User Execution: Malicious File
T1566.002 Phishing: Spearphishing Attachment
This PDF file was flagged as malicious by a machine learning classifier and ClamAV due to obfuscated content and embedded JavaScript. The presence of JavaScript actions and embedded JS streams, combined with the use of ASCIIHexDecode and ASCII85Decode filters, indicates an attempt to hide malicious code. The primary attack pattern involves exploiting PDF vulnerabilities to execute arbitrary code, likely leading to the download and execution of a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
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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