PDF malware analysis — malicious · 3261929a3ebb9753

MALICIOUS

PDF

10.9 KB

MD5: ed1af4952fc6d481d57a3605b86990c9 SHA-1: 4d3bcfe8f79748ce46bff0487d9e80fb34023c8b SHA-256: 3261929a3ebb975309a0a6e8e0609b18ea602d1498b7abfa831f57c8d9de85c3

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML_NYX_PDF_MALICIOUS heuristic and the high severity PDF_UNESCAPE firing suggest malicious intent. The embedded JavaScript file, javascript_obj0007_000.js, is likely responsible for downloading and executing a second-stage payload. The document body was not sufficiently readable to determine a specific lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `7ebf3b95c46779ea04caa7ea551aa842277624778fc7312599c43a63d2266511`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	48089 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 246 eval/decoder/string-building token(s).

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