PDF malware analysis — malicious · fd903667de096e64

MALICIOUS

PDF

29.1 KB

MD5: 70343e74bf453941a1845a3f53c1a96a SHA-1: 2dfe1a7a33f4aa81060137c271d41c161ff05a85 SHA-256: fd903667de096e64689493f82076701eb31fdc6e5aaf56e6db560c2814684190

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_CORRELATED_MALICIOUS_JS. The ML classifier also strongly flagged this PDF as malicious. These signals suggest the JavaScript is likely used to exploit a vulnerability within the PDF reader to execute malicious code. No specific family could be identified, and no URLs or hashes were extracted.

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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