PDF malware analysis — malicious · 71dd1e72a4178148

MALICIOUS

PDF

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

MD5: 5ae43b0f54138aeb8ff6936f27ed81d2 SHA-1: 9ecc56c2962da2fb8cad99bc081de010b0f4cd88 SHA-256: 71dd1e72a417814841e823bc641dd1ebb600150e010ed80541515e74796dc456

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detections. The JavaScript is responsible for downloading and executing a second-stage payload, as indicated by the 'Pdf.Dropper.Agent-1828805' and 'Win.Trojan.Agent-36166' ClamAV signatures. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-1828805 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828805
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` `f455bbec8e34aa802a8ca8323493d56f9051fdff2bb27e94452fd053084aa6f0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75037 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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