PDF malware analysis — malicious · b3c454254acd30f0

MALICIOUS

PDF

2.7 KB Created: 4181-01-01 Authoring application: 3677

MD5: fa7ef1a237c5ecb0013dd13fd861eff1 SHA-1: d2b082e4f58b7f28746da43d44e8194e37960d23 SHA-256: b3c454254acd30f0bb1fa76daa75cedff136cb956d91fc185aee16a9ebf84fc7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Pdf.Exploit.Agent-36014. Static analysis revealed embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. This JavaScript is likely responsible for executing an exploit, as suggested by the ML_NYX_PDF_MALICIOUS firing and the suspicious extracted artifact. The primary IOC is the embedded JavaScript file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36014 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36014
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `be7619b1328bb71d22befdec63f585ff695a4404db02e4448cbd021dd86c1a7f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x328	4796 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).

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