PDF malware analysis — malicious · d6bdf70c0dc8bb30

MALICIOUS

PDF

6.9 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 16eb05c2cc1b660df41a5e85b0c83c47 SHA-1: 7ce5ac6f9d23490bcc8390d82b98300b3391e104 SHA-256: d6bdf70c0dc8bb306f4c084892649f5a00a498eed8e22a0e785d1e9111c566a2

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript with multiple eval() calls, indicating obfuscation. The script likely attempts to download and execute a second-stage payload, as suggested by the 'ML_NYX_PDF_MALICIOUS' and 'PDF_EVAL' heuristic firings. The reconstructed string 'Math.ceil(kgFVawomcLUd1/h5gwtvST' and 'Math.min(kgFVawomcLUd1,h5gwtvST' are part of the obfuscated JavaScript execution flow.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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_001.js` `7cd9cf1d5e17255e025ddf34e84cc1fef4895b517e07021745bb4bcf0a805d28`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3DB	5392 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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