Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5ae96aeb6867ac…

MALICIOUS

PDF

45.5 KB
MD5: adab7c0a21aef875da65f11f31a226d0 SHA-1: 0fa5c5a7b5545af37167ac47cee7d7084c9f161e SHA-256: af5ae96aeb6867ac599455714e460b80bc8cedc17507e4383b664458f9f392d4
84 Risk Score

Malware Insights

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

The file is a PDF containing 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 is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code, potentially downloading a second-stage payload. The document body is heavily obfuscated and does not provide clear user-facing content.

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
d300dae81ca0d1c5c2dc6b0bf37eed067209447d7a4d2b038d1507db39c1ec03		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1EE 3856 bytes

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