PDF malware analysis — malicious · c047648524c04c7b

MALICIOUS

PDF

3.0 KB

MD5: f1416c8597d1bfeec3eb3dcd747dc0d7 SHA-1: c8760231be04f3b0495be3aaa17ee80bf446e028 SHA-256: c047648524c04c7b20a330bca3c8995f5373ab227ca5a61acd0cc0c0cc21927c

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The embedded JavaScript stream, named 'javascript_obj0009_000.js', is likely responsible for executing the malicious payload. The ML classifier's high confidence score and the ClamAV detection strongly suggest a dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7217518-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7217518-0
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0009_000.js` `e4ef9c741d4b1abe4a2bb775d972ee05f382cf211c9dada1ae665d96e8e3dbf6`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	20833 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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