Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8388c1c2c5c75db…

MALICIOUS

PDF

46.0 KB
MD5: 69ea398bb57487c2e02106bf3194a03a SHA-1: 4d7e9e86a5158fc12da6458c0ccb88205e990196 SHA-256: f8388c1c2c5c75dbb1e8aaf02eca03308b5a20e9dd3c8849c19c5102c1164b0f
84 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 ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The embedded JavaScript file, 'javascript_obj0012_000.js', is the primary artifact and is likely responsible for downloading and executing a second-stage payload. The document body is heavily obfuscated and does not provide clear user-facing content, reinforcing the focus on the script's behavior.

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
da7c9f6ced6f5306222324ca9ebdeecd7c1621d369ed008cd8d34b4a36c16cf0		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F3 4425 bytes

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