Malicious PDF — malware analysis report

Static analysis result for SHA-256 233485a2067500e8…

MALICIOUS

PDF

45.5 KB
MD5: 861c5dd435eb8f537fdfd4da891596d4 SHA-1: 5e16934ed0428888c444d63ea24b1ba326ea7434 SHA-256: 233485a2067500e84e4d43c43a6d0e0051a6c9fffeb45555491113308f3966a5
84 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV with 'Heuristics.PDF.ObfuscatedNameObject', indicating obfuscation techniques commonly used to hide malicious content. The presence of embedded JavaScript streams further supports this, as these are frequently used to download and execute secondary payloads. While the document body is unreadable, the combination of PDF obfuscation and embedded JavaScript strongly suggests a malicious intent, likely for delivering malware.

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
d1d6d6dd5ed66f9b9159949047f117305beab2b0cb4bd471bcb7767540775758		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D7 3870 bytes

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