PDF malware analysis — malicious · e5f572183d354598

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: d7a1dc093241a22b1f08a5eb02cff13a SHA-1: fa6f955fd90fea16e6e9784f364d97b8c6525819 SHA-256: e5f572183d3545984d1b808f2d247adf82912dd4bba27244c1fc3b80c6fe60b2

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'. Additionally, it contains embedded JavaScript, indicating an attempt to execute malicious code upon opening. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

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` `889296c842c10774f27fd03922e1e948692684b86600f56a545f26df9913b1a8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74488 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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