Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2686e66d71a6f64…

MALICIOUS

PDF

45.5 KB
MD5: 4a671a30dce8a1a7cfd76ab88b5ea0e8 SHA-1: 641c6bae3730d095a8357cfea3cf54792c11085b SHA-256: f2686e66d71a6f64aba0d6fbb12352b98b018c3c0e175769ddb222c4ffb15b94
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, detected as 'PDF_JAVASCRIPT' and 'PDF_JS', further supports this. While the document body is unreadable and no specific script actions could be definitively determined due to obfuscation, the combination of these factors strongly suggests the file is designed to execute malicious code, likely through an exploit or by downloading a secondary payload.

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
eb55aaa0f5428b7da2e349ed57367b95cc29fa38c80546284592d73dbf1910f4		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F6 3827 bytes

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