Malicious PDF — malware analysis report

Static analysis result for SHA-256 58134d8ee51eb0ca…

MALICIOUS

PDF

45.6 KB
MD5: 1209289214f37ddbbe9422cf2f6a7553 SHA-1: 5b059727920c8ff20131899f0b36accbfcf66cb2 SHA-256: 58134d8ee51eb0ca42c10e60ed5d2dc4d02a0e9db77f11022814752059968c20
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier also flagged this PDF as malicious with a high score. While the document body is heavily obfuscated and unreadable, the presence of JavaScript suggests an attempt to execute malicious code. The specific intent of the JavaScript is unclear due to obfuscation, but it is likely to download and execute a second-stage payload or exploit a vulnerability. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9285

Heuristics 5

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
39c0f7badeaec63dd00a9ac761a68415871f19a477ff56911f52892fcad6b8ee		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F5 3966 bytes

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