Malicious PDF / .SWA — malware analysis report

Static analysis result for SHA-256 0b4f6f7ddfbc1c5f…

MALICIOUS

PDF / .SWA

7.2 KB Authoring application: Bofatezozinefaxfa (via 7d97cVogewojixariuawi)
MD5: 43bd9be895c788059b1c80ed1fe2cca6 SHA-1: 419b33cd80abe5db0ee9b4a1510c3fd1d7ac8989 SHA-256: 0b4f6f7ddfbc1c5f4382858e1c13cdf5a3ec30f2a91441870b4ed0312d6548ab
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains obfuscated JavaScript, flagged by multiple heuristics and ClamAV as malicious. The JavaScript is designed to download and execute a secondary payload, indicated by the presence of download-related functions and string concatenation for constructing URLs. The ML classifier also strongly indicates maliciousness.

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.

FilenameKindSourceSize
javascript_obj0011_000.js
ca838ab153ea9de4fff1e74bdd0848fd720f71bc6fbee4425be234136cd19b41		 pdf-javascript-stream PDF /JS object 11 at offset 0x1349 2325 bytes

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