PDF malware analysis — malicious · eb50acc4b24d807d

MALICIOUS

PDF

27.7 KB

MD5: 8325a11e7cec263bdb12af12bb1b002a SHA-1: b527edef46808afea892e85edd46fc6ce8f74ff9 SHA-256: eb50acc4b24d807df7ecae870303f89f631ed693b9028f9e4085ebb0a9aa92dd

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF contains embedded JavaScript, which is flagged as malicious by multiple heuristics including a high-confidence ML classifier. The presence of ASCIIHexDecode and ASCII85Decode filters further indicates obfuscation commonly used in malicious PDFs. The primary attack pattern involves the execution of this embedded JavaScript, likely to exploit vulnerabilities or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Correlated malicious PDF JavaScript signals critical PDF_CORRELATED_MALICIOUS_JS

PDF JavaScript or auto-action content is corroborated by exploit staging, ML, or suspicious extracted-artifact findings. This correlation promotes old exploit-kit PDFs that otherwise remain in the suspicious band because each individual signal is intentionally weighted conservatively.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

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