PDF malware analysis — malicious · b0a2364ff94108aa

MALICIOUS

PDF

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

MD5: fb3e675a896d52c8a066d9545c47ea47 SHA-1: 79aac838235501d52624f3a5513075edfa6fa6ec SHA-256: b0a2364ff94108aa43ff6930c3c52bc1846e9bc41af225a4275af866095c92fc

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection identifying it as 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, indicated by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests the script is responsible for the malicious behavior. While the script content itself was not detailed, the heuristics and ClamAV detection strongly indicate it's designed to download and execute a secondary payload. The ML classifier also provided a very high confidence score for maliciousness.

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` `ea600d7ad6c1f684f04cee2e39723d9c2674a6c180ff31c03bb6f219e6004a6e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84166 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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