PDF malware analysis — malicious · 1fa3b8ba143fea2c

MALICIOUS

PDF

10.9 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 341916698b51f0d970e3dcc4f6963693 SHA-1: 2703084adccf0c8d472f709a797c536359c6f4c1 SHA-256: 1fa3b8ba143fea2cc642285a2737f3b8c1211dd2c17ff57d05d112716891a6ef

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains obfuscated JavaScript that utilizes eval() to execute malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a dropper. The JavaScript appears to be designed to download and execute a second-stage payload, as suggested by the 'eval()' call and the 'ML_NYX_PDF_MALICIOUS' heuristic. The specific ClamAV detection name 'Pdf.Dropper.Agent-7237518-0' further supports this. No specific family could be identified due to the obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7237518-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7237518-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj0013_000.js` `68868699f8ecadc97abe9a7fae80f1b59f6087b24e01b0b11f8465e07af7fbb4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9574 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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