PDF malware analysis — malicious · 1b2708f70e719981

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: e3528d93288fec34ae4cf9f8d7c1510b SHA-1: 5f7d2e4cac86246c3193b8496ea4911ba2c703b4 SHA-256: 1b2708f70e7199814a125fcf4f852bb5eb28af32e0824783cf3f7cfb3ebe0f0c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was also detected, indicating the likely execution of a malicious payload. The ML classifier strongly supports the malicious verdict. The specific nature of the JavaScript payload could not be determined due to its size and potential obfuscation, but its presence alongside the ClamAV detection points to a downloader or exploit execution.

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` `b7790f7b591dfb668f8f7581a6671b7cf0383fbd4860e1a4819780f29fc3bbf8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75174 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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