PDF malware analysis — malicious · e89e39a201361662

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 58f2eUohosicilab)

MD5: b7f36f4256e5e1115ab86bfde9d806fa SHA-1: 9e3423bab3edee93fce0a287c00ca4262fc8f263 SHA-256: e89e39a201361662fdc978df7def470679785b01fe509459d0d3f58adad6f0f1

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating maliciousness. The presence of embedded JavaScript, identified as 'javascript_obj0011_000.js', strongly suggests an attempt to execute arbitrary code. The obfuscated nature of the PDF content and the JavaScript stream indicates a deliberate effort to evade detection, likely serving as a dropper for further malicious payloads.

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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