Malicious PDF — malware analysis report

Static analysis result for SHA-256 5552ea114d0c1c4b…

MALICIOUS

PDF

159.7 KB
MD5: 358f562c0e40e05dc16f859f1d8ae8b5 SHA-1: e70883cadb2fc225b523cc178a41ee21e1ff46ab SHA-256: 5552ea114d0c1c4bf50d1a0a4bc031dc96dab6b18ab3aa565064d5e4e03236b2
122 Risk Score

Malware Insights

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

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript, RichMedia (Flash) content, and the use of ASCIIHexDecode filters, which are often used to obfuscate malicious code. The ML classifier strongly flagged this PDF as malicious. The embedded 'Tatsumaki.swf' file is also a significant indicator. While the exact script functionality is not fully detailed, the combination of these elements suggests an attempt to exploit vulnerabilities or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
Tatsumaki.swf
4fb5624796fc202565a8cef151638a3ca8a8dbf08ce470030baae808d938058a		 pdf-embedded-file PDF EmbeddedFile object 18 at offset 0x2CFA 3252 bytes

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