PDF malware analysis — malicious · 6ddfc29af2a62df0

MALICIOUS

PDF

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

MD5: b532b87ca5e42854dd363d0beb6ce5b5 SHA-1: a19a77e27906bcf240772f3b6267bce78210e8f2 SHA-256: 6ddfc29af2a62df07d6a92ca99124bbbd56416a63d25e5a2c84691a9515590bb

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics, and is detected by ClamAV as Win.Trojan.Agent-36166. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The presence of JavaScript and the ClamAV detection strongly indicate a malicious document intended for payload delivery.

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` `c8380fef75831122358fedff38c2e6c0544fbbd102d1de903f7559a5a6b2bee6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75155 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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