Malicious PDF — malware analysis report

Static analysis result for SHA-256 c092e5809bcfb6e4…

MALICIOUS

PDF

54.8 KB
MD5: 8bf034122ce617c369325321ff45974f SHA-1: 239772f72807f8c2b3635a020fa0f5a4c17a8b4a SHA-256: c092e5809bcfb6e4ccdc79f88249ca9966dfcdfae902b3181b3ccd581656b602
94 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicating an attempt to exploit vulnerabilities. The embedded JavaScript stream, identified as 'javascript_obj0006_000.js', is likely responsible for initiating the malicious activity. The presence of an embedded SWF file ('vTMCfcpi.swf') further suggests a multi-stage attack. The heuristics indicate the use of JavaScript actions and potentially obfuscated code, consistent with a downloader or exploit delivery mechanism.

Heuristics 8

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://adobe.com/AS3/2006/builtin

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
vTMCfcpi.swf
a23bb72a634490447a00d59de9509361d071ff9c68719cf8c72b3f5d5efd2d4a		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x1509 50386 bytes
javascript_obj0006_000.js
473818df33501b44566ee70d0da77cf85bed1a34f3ac456ea5ee1d3b9dea9db2		 pdf-javascript-stream PDF /JS object 6 at offset 0xEC 4122 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).

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