PDF malware analysis — malicious · 5af3444d080ffaa9

MALICIOUS

PDF

7.3 KB Authoring application: Bofatezozinefaxfa (via 55cd8Vogewojixariuawi)

MD5: 4064988a6da43563e42ce06a9f486119 SHA-1: 30917afddf9e8cdff42ec175fdc2b09ab8ef536f SHA-256: 5af3444d080ffaa92a99dbe008a405902902d527f745727725292bb0eddc7dd2

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects. The JavaScript appears to be designed to download and execute a second-stage payload, as indicated by its structure and the presence of obfuscated strings that likely form URLs or commands. The ML classifier also strongly indicates maliciousness.

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` `ca838ab153ea9de4fff1e74bdd0848fd720f71bc6fbee4425be234136cd19b41`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1349	2325 bytes

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