Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34c1f98ea15a047…

MALICIOUS

PDF

45.8 KB
MD5: b372f72ca89f5e2421443f35cf6b54fc SHA-1: 88f7711ed5582d9589bc999bdcc1154960b3a9cc SHA-256: b34c1f98ea15a0478ce7fa5477340612f57d7cfdfd05ead8b55b64accf82e6d8
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 'Heuristics.PDF.ObfuscatedNameObject' further confirms its malicious nature. The embedded JavaScript is the primary mechanism for attack, likely used to download and execute a second-stage payload. While the specific URLs extracted are not definitively malicious, they are associated with the document's structure and potentially used in the attack chain.

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
867c4e4d215bd47c5e05bb91b880ba7d85c0bf4b5250d6913a7657e9cf4cddf2		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1EA 4108 bytes

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