Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fcfa62ec653fe0…

MALICIOUS

PDF

894.7 KB
MD5: c47ccc69ca3c2a0dfc7a18a030fd423d SHA-1: 10d2ee9eacee97de0540bd9e270076ae42a5b6a6 SHA-256: 28fcfa62ec653fe0af066361d225d33b37ab21c936cbf5c1a5d4e7fa6f912670
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file exhibits high-risk indicators, including embedded JavaScript and a Flash object (Tatsumaki.swf). The ML classifier strongly suggests malicious intent. The embedded JavaScript and Flash object are likely used to execute arbitrary code or exploit vulnerabilities within the user's system, potentially leading to further payload delivery or compromise. The presence of unknown XFA-related URLs suggests a potential vector for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdfx/1.3/
    • http://ns.adobe.com/xfa/promoted-desc/
    • 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
Tatsumaki.swf
93d4dfc19b02f2382f3de8207a9fea88c65503900c685c29eeed5c068b813d24		 pdf-embedded-file PDF EmbeddedFile object 18 at offset 0x266C 4057 bytes
javascript_obj0006_000.js
aef807b24abe25edf4cf47abd3109baa905c1e2b9e59b120cb637d52691a47a8		 pdf-javascript-stream PDF /JS object 6 at offset 0xFC 8775 bytes

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