PDF malware analysis — malicious · 743cdf3c9a2a1196

MALICIOUS

PDF

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

MD5: 0f45088af1bd1aab9674eb55a08b7de7 SHA-1: b9255ffce2b7ee1115063fc320e7f4f35440f831 SHA-256: 743cdf3c9a2a119693b468e6706e1f74aca75179a5d8cbde7a22c36d6dcec996

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a large JS stream. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript, though heavily obfuscated, is the primary mechanism for executing malicious code, likely to download and execute a second-stage payload. This points to a common attack pattern involving malicious documents delivered via phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 3

ClamAV: Pdf.Dropper.Agent-7272974-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7272974-0
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` `ed6f63e97727755de4ec98a4efa4c92bfab90f44b4b180a93420db0f2e30c48b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	116905 bytes

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