PDF malware analysis — malicious · 7102c10eb3c52686

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 0fd5994282f624f599ca787580b88820 SHA-1: 79a0e123f49324a91c47c894153f24330bc06c75 SHA-256: 7102c10eb3c52686aad7aeb61c3ff0681686024b698b6fb5d204d89846846181

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript which is likely responsible for downloading and executing a second-stage payload, as indicated by the 'Win.Trojan.Agent-36166' detection. The JavaScript itself is heavily obfuscated, making a precise analysis of its actions difficult, but its presence strongly suggests an exploit attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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.
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_obj0007_000.js` `9aba795c79edc2dbf58f5203d4668480fec407266516b952b2890d6be4efe410`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74849 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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