Malicious PDF — malware analysis report

Static analysis result for SHA-256 41740021f71cf2b8…

MALICIOUS

PDF

29.8 KB
MD5: c27c308ae81d723b403f5a9b97149e49 SHA-1: 093a6a13ab57c521c44bc719cade0b022296a732 SHA-256: 41740021f71cf2b852b35ad4613a2fe3673b3cb8fc87c8c28a5e9737c18fe6b5
112 Risk Score

Malware Insights

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

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and RichMedia (Flash) content. The ML classifier strongly suggests maliciousness. The presence of 'test.swf' and 'javascript_obj0006_000.js' as embedded artifacts indicates an attempt to execute potentially harmful code or exploit vulnerabilities. The embedded JavaScript, though obfuscated, likely facilitates the download or execution of a secondary payload.

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 0x8CC 53991 bytes
javascript_obj0006_000.js
33d522c40b1f237c86bae668f15fbc9ed52e4fb9b3b5769a3b1d7b484020cd98		 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.