Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f62779f707cd553…

MALICIOUS

PDF

894.3 KB
MD5: 62ce3ca2c6a4e4d360efbc92d36bb911 SHA-1: d53d26f8e8d7d1f62a599f25f31cad1c3b5f45bf SHA-256: 3f62779f707cd55323c868353fb3c73eb847f0ab71b0d27c62a192b28bd48943
72 Risk Score

Malware Insights

MITRE ATT&CK
T1559.002 Component Object Model Hijacking T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF contains embedded JavaScript and a Flash (SWF) file, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The embedded SWF file, named Tatsumaki.swf, suggests a potential exploit or malicious content delivery. The presence of unknown URLs related to XFA forms also warrants attention. The combination of these elements points to a likely attack pattern involving the exploitation of embedded content within the PDF.

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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