Malicious PDF — malware analysis report

Static analysis result for SHA-256 1296538def12f76b…

MALICIOUS

PDF

124.2 KB
MD5: 09f0b4df91ffdac5a9b4d314d3c26c7c SHA-1: fc472bd631399f98ecbf11c2a1ab651d2e0c13a5 SHA-256: 1296538def12f76b9e8869d37336335e7912749d3ffed599cfd86da25532e639
206 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript and triggers heuristics for PDF JavaScript exploits and the CVE-2010-2883 vulnerability. The JavaScript code is obfuscated but appears to be designed to download and execute a secondary payload. The benign URLs present are likely decoys or unrelated to the malicious functionality.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3425

Heuristics 7

  • Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883
    PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • 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
javascript_obj0012_000.js
954e55a4caef2130afa5edad4189120d1d1cf0b427f4501cc75736b1aa73a759		 pdf-javascript-stream PDF /JS object 12 at offset 0x1E499 6266 bytes

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