Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcdc9280dfbecad…

MALICIOUS

PDF

29.8 KB
MD5: c85d748dede66fcdf84a2e5dad9f6d9c SHA-1: 3711bd67ad5fa9a68513141daec6c305249b645b SHA-256: abcdc9280dfbecad6bca4801976a9943a3e9b7d6cd759ed99377b566dd5c5d91
112 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a Flash object (test.swf), both of which are common vectors for delivering exploits or further malicious payloads. The ML classifier strongly flagged this PDF as malicious. The presence of these embedded objects suggests an attempt to execute code or exploit vulnerabilities upon opening the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 0x8C8 53991 bytes
javascript_obj0006_000.js
8483c12569e759d4dde31dda283e816729d9b6965c7b8681669d8716d4943eb8		 pdf-javascript-stream PDF /JS object 6 at offset 0x106 11498 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 239 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.