PDF malware analysis — malicious · a10ec1c223abce82

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 0ddfaUohosicilab)

MD5: 2c686e5d8e8c86d6f967531e70e4f5d2 SHA-1: d51a9a39cadd6aeac27fd89e248a1f2daafa6340 SHA-256: a10ec1c223abce820af5f0c9739a7ec7e9a3dbd5b19a888ff42e01c0c02263af

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

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. This JavaScript is likely responsible for the malicious behavior, potentially downloading a second-stage payload or exploiting a vulnerability within the PDF reader.

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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