Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ca093dc952342e…

MALICIOUS

PDF

45.4 KB
MD5: a569b027ce977aa6f0a654d859138627 SHA-1: 702abdc17f7071aefbb84bd6c9640b2786c83fac SHA-256: 57ca093dc952342eede295dc6c000c65e1a5fdda542751e770d7c14403db9f9e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including PDF_JAVASCRIPT and PDF_JS, indicating the presence of embedded JavaScript. A critical ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports its malicious nature. The ML classifier also assigned a high probability of maliciousness. While the document body is unreadable and no specific script actions could be definitively determined due to obfuscation, the presence of JavaScript in a PDF commonly indicates an attempt to execute malicious code, potentially leading to exploit or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

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
de367eeec0604ea09ae721f56bd386e7ba55ddde84431e1e7cba147f9c494533		 pdf-javascript-stream PDF /JS object 12 at offset 0xA214 3764 bytes

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