Malicious PDF — malware analysis report

Static analysis result for SHA-256 d313a689f1528d8f…

MALICIOUS

PDF

36.4 KB Created: 2010-10-16 15:03:49
MD5: 6cc2a162e08836f7d50d461a9fc136fe SHA-1: a3caae91440608ffe3dcb4872c9830ad835dd036 SHA-256: d313a689f1528d8f427b9ed22be6e8188e412b1736ba3994c6512da8fe2a8d3f
104 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The embedded JavaScript stream, named 'javascript_obj0043_000.js', is likely responsible for executing malicious code. The presence of PDF_FILTER_HEX with exploit indicators and ClamAV's detection of 'Heuristics.PDF.ObfuscatedNameObject' further support a malicious intent. The primary function of the script appears to be the execution of arbitrary code, potentially to download and run a secondary payload, which is a common attack vector for PDF-based malware.

Heuristics 6

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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_obj0043_000.js
f1fe082ae335345df486a7d47d467fb6c13534787216bea863054635852e294e		 pdf-javascript-stream PDF /JS object 43 at offset 0x6D83 81 bytes

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