PDF malware analysis — malicious · 4239a6c2f675036d

MALICIOUS

PDF

10.7 KB

MD5: b5a4e606aa5a7dd825b0bdb7441ebacf SHA-1: e126932a8e169b6b2c563133973ed7b88c1bb4dc SHA-256: 4239a6c2f675036d37093f28874ea9830524933e183aff23fa951d0ce4c3c768

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests obfuscation, and the ML classifier strongly flags it as malicious. ClamAV identifies it as Pdf.Dropper.Agent-7254580-0, a known dropper. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for malware droppers.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7254580-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7254580-0
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` `2c82a3f5c560fa86ed533586c22bdefa0c562d7ccc71a8cab75fb87068c82e45`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	47204 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 241 eval/decoder/string-building token(s).

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