PDF malware analysis — malicious · 3f87dde184be4dac

MALICIOUS

PDF

7.7 KB Authoring application: Qimigiwova (via 86702Bashemeriwesohitaro)

MD5: fa439df28f010f9def75d8711c630251 SHA-1: 6608eaf2a64b4e269af34239bbc5bb09b2471306 SHA-256: 3f87dde184be4dacde3b4232e930c4bfdba408487eee03a0025657bbbf5aa049

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code, although the specific action cannot be determined due to obfuscation and truncation of the script content.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 3

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0010_000.js` `ed31b16df2b6492a4d5be85b534deca964c2f0e07a8443782787f4ed9c62c93c`	pdf-javascript-stream	PDF /JS object 10 at offset 0x1303	3192 bytes

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