Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3f0813353fbd0f…

MALICIOUS

PDF

481.6 KB
MD5: eed8e7000326b8a3c3f234db361c862a SHA-1: 02f3add91309c1735807336271b5c4c38ddd9a74 SHA-256: 3b3f0813353fbd0fa056875e66b1319feb4cbe692b6b31b6cad3f4d33d94874e
144 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded JavaScript, which is a common technique for delivering exploits. The critical heuristic firing for CVE-2010-2883 indicates a known vulnerability in Adobe Reader is being targeted. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact functionality could not be fully determined due to obfuscation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3321

Heuristics 6

  • 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.
  • ClamAV: Pdf.Exploit.Agent-30121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-30121
  • 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
c4ba3591c3074e8fbc2f51681f2267ae4d6650196a96437268cf3aa864f515e3		 pdf-javascript-stream PDF /JS object 12 at offset 0x77A5F 5835 bytes

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