Malicious PDF — malware analysis report

Static analysis result for SHA-256 5679dc00d796d889…

MALICIOUS

PDF

35.5 KB Created: 2010-10-16 15:03:49
MD5: 6c0f280e72d7365afa8785d2df2cef82 SHA-1: c46d70aa708953a7a13391262bf8491e59c0b456 SHA-256: 5679dc00d796d8891dcb79bfdbb88487e7dd078cacc19feb88daa7fb94726d5d
104 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The embedded JavaScript stream, though obfuscated, is likely responsible for executing malicious actions. The CLAMAV_DETECTION heuristic further confirms the malicious nature of the file. The presence of XFA forms and ASCIIHexDecode filters suggests an attempt to obfuscate the malicious content. The primary function appears to be downloading and executing a secondary payload.

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 0x6DA7 81 bytes

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