PDF malware analysis — malicious · 2f89c94be56b9430

MALICIOUS

PDF

7.1 KB Authoring application: Wezolokofecpo (via 529d0Nworeticakebi)

MD5: c16bc223f6c471edf72141eebd1f1d0b SHA-1: 9e1b990d19b04fe34e8306b372a178d42fda6718 SHA-256: 2f89c94be56b9430635ca57d0a955a2ae25850b63bc84f05aa2a6c1afaa56791

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection strongly suggest malicious intent. The obfuscated nature of the JavaScript and the PDF structure point towards an attempt to exploit vulnerabilities or deliver a malicious payload. The specific attack pattern is inferred from the common use of malicious PDFs to deliver malware or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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` `437a5d40b54247c17dfb3ac60e39d3ecfad672a269694af1851a077d9726a8d2`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1342	2272 bytes

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