Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91195491a18ef9c…

MALICIOUS

PDF

45.1 KB
MD5: d305b518ec262c0ef6334d6ee477f0ef SHA-1: 0d4def238451ac940efb53b0ae8333e667bcbcde SHA-256: f91195491a18ef9c81100744918bf0394b273a74c1d593215835a7bb040a1c9f
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The document body text suggests a social engineering lure, claiming incompatibility with the user's PDF reader to prompt further action. The embedded JavaScript is likely responsible for executing the malicious payload, potentially by downloading additional malware or redirecting the user to a malicious site. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file.

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
92e581d4c5385fce618eb1067a23eaa171c84cdf45d32466cdf631298a1bd8f4		 pdf-javascript-stream PDF /JS object 12 at offset 0xA248 3484 bytes

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