PDF malware analysis — malicious · bb4701df99fc5bdd

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via abb22Uohosicilab)

MD5: b8c0e6fbb0449e1364a191ce5448ad23 SHA-1: 834942e463dc1983a51b299606a2f1ec31670618 SHA-256: bb4701df99fc5bdd1bcfa98e9ad4c1db6554c7794f6b73d523299399576c17f8

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a high-severity ML classifier and ClamAV, indicating malicious content. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS rules, strongly suggests an attempt to execute arbitrary code. This JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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_obj0011_000.js` `c35f939b8b08b4458e4f2307d4bfd0afc23546c955e11c1da88e87302e40c9b0`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1358	3029 bytes

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