PDF malware analysis — malicious · 27c8cfde66cf7fa8

MALICIOUS

PDF

27.0 KB

MD5: 698ce037b9002858c8ba0778b873dcb1 SHA-1: 3bee0fdc324494449a12118379d10607d9edbdc8 SHA-256: 27c8cfde66cf7fa896d8f484e2dc6a4003e582582b21bb44bbbf27c7673d1942

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript

The PDF contains embedded JavaScript, which is flagged as malicious by multiple heuristics including a high-confidence ML classifier. The JavaScript is likely used to exploit a vulnerability within the PDF reader, leading to the execution of malicious code. The presence of ASCIIHexDecode and ASCII85Decode filters further suggests obfuscation techniques commonly used in PDF exploits.

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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