PDF malware analysis — malicious · 69bf4b59058de494

MALICIOUS

PDF

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

MD5: fd5583f27222d1bd4181b4f0a4f51e16 SHA-1: 94697ce4aa0f66316d8b23c04630543d3a971b21 SHA-256: 69bf4b59058de4946259b1ae70abc26dabf3a76a4f547c1a5fcc21c834a78250

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities and downloading further malicious content. Heuristics and ClamAV detection confirm the malicious nature of the file, identifying it as Win.Trojan.Agent-36166. The JavaScript appears to be obfuscated, but its presence strongly suggests it is used to download and execute 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` `5a79b3eb9daf1f3f2598e1222c47333ac14a44c77ffa883233c3a645dec5aa15`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74601 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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