PDF malware analysis — malicious · ebbba6e308690828

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 135fbUohosicilab)

MD5: ebe251676c3928bd9734528f77be23f6 SHA-1: 588b0ed757c1aaf1d007b96a96fd66ab84a627ad SHA-256: ebbba6e308690828baaab6d25b93909e156c865d14b735a62cba37f0511897b8

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier. The presence of embedded JavaScript, indicated by 'PDF_JAVASCRIPT' and 'PDF_JS' firings, suggests an attempt to execute malicious code. The obfuscated nature of the document body and the embedded JavaScript stream points towards an attack pattern involving code execution, likely for delivering a secondary payload or exploiting a vulnerability. The SHA256 hash is included as a primary indicator.

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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