PDF malware analysis — malicious · 888928c85f110e30

MALICIOUS

PDF

2.7 KB Created: 6941-01-01 Authoring application: 1975

MD5: 2a4f8e637a653bf94348813eaaa2049c SHA-1: 4b398e676429063c16d8cc29eeee922ae537f1d5 SHA-256: 888928c85f110e30da68dd2c13fd93fd8c92be98051797f9cfcbd894d44d469e

128 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 and an ML classifier. Static analysis revealed embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The extracted JavaScript file, 'javascript_obj0013_001.js', shows signs of obfuscation and hex escape sequences, suggesting it's designed to deliver a payload. The primary attack vector appears to be exploiting vulnerabilities within the PDF reader via this embedded script.

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` `4ae5d0cc333a73b8e853d3874c8cb8313e0b156d92f9203b321109efa568f312`	pdf-javascript-stream	PDF /JS object 13 at offset 0x328	4754 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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