PDF malware analysis — malicious · 82d664b34caba46b

MALICIOUS

PDF

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

MD5: 0cef69e411c48652608e088ddc7b3f9a SHA-1: 1ecc30958ea7dfc19552e16c6b5034b4ea33fd97 SHA-256: 82d664b34caba46bb74bb481d311fff35b1cfcfe397ee23051bbf716e1ecd5d9

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of exploit. It contains embedded JavaScript with multiple eval() calls, suggesting obfuscation to hide malicious code. The script likely attempts to download and execute a second-stage payload, as indicated by the heuristic firings for PDF JavaScript execution and eval() usage. The reconstructed string 'p3wmWXOYPUIue=Math.min(H3s7kU0UhUY,N2hsXXtD6koY 'wX7wLmb|=(BoujQNnxVe7nr2['e1gXraTW4UguT.charCodeAt(GfaCCylcT4X+ Y0HCuEZN4TNlb pSwdi=String["fromCharCode"](181^wX7wLmb))') is part of this obfuscated code.

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` `161b3ac83319b8866876407318e2e8832d21f470597c55b764682c5465411729`	pdf-javascript-stream	PDF /JS object 13 at offset 0x391	5139 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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