Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bab5a25091d394e…

MALICIOUS

PDF

29.8 KB
MD5: 7c6f131a51e280273a68bc1a59af60fd SHA-1: b5697fad74f0076bfb28fa1a43262294f290774d SHA-256: 8bab5a25091d394edd0932794e92177141fbcdbfbfa9056c0871e49cf337f855
82 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1559.001 Component Object Model Hijacking

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and a RichMedia (Flash) object. The presence of a JavaScript stream and an embedded SWF file suggests an attempt to execute arbitrary code or exploit vulnerabilities. The heuristic firings indicate the use of JavaScript actions and string manipulation techniques common in obfuscated malicious scripts. The extracted artifacts, 'javascript_obj0006_000.js' and 'test.swf', are likely components of the attack.

Heuristics 8

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
test.swf
4d4d42d908c48737d0cbe1f33c14f197803950e6ff47f9c0f13e1d51a231494d		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x8DA 53991 bytes
javascript_obj0006_000.js
24126d4a6f0d46c63d586ed9bd19bbc7964db9533f0264190420b33778d0973e		 pdf-javascript-stream PDF /JS object 6 at offset 0x106 11522 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 239 eval/decoder/string-building token(s).

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