Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea44c7d67cd30c68…

MALICIOUS

PDF

45.3 KB
MD5: f04491ddb2fc112a36f094ecde2eb5c0 SHA-1: 95fb9837a4abbe301cbb0467f1b7a8f68f18f768 SHA-256: ea44c7d67cd30c68d3a70f92ffb4f820c004afc47c5019599c767e2c5dffb120
114 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ML classification and ClamAV detection for obfuscated content. The presence of embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS firings, suggests an attempt to execute code. While the document body is unreadable, the overall indicators point to a malicious PDF designed to deliver a payload, likely through JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
3bfe4b0205332d2a3a00ef4bfc281397645ec665629a5ac3cf3c1a9aff6aabf0		 pdf-javascript-stream PDF /JS object 12 at offset 0xA204 3833 bytes

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