Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1421b64f7a2973f…

MALICIOUS

PDF

44.8 KB
MD5: 87ed296d54767d63d283e56cc22c2316 SHA-1: b535f526b33fb2d91cdd880b2fefd6984c120228 SHA-256: a1421b64f7a2973fa7d331f7c4f0af1fd7dfe1f0d4edefcc7cfc466dd5d81981
104 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains embedded JavaScript and utilizes an ASCIIHexDecode filter, indicating an attempt to obfuscate malicious content. Crucially, it triggers the CVE-2010-2883 heuristic, which exploits a vulnerability in Adobe Reader's handling of SING fonts. This suggests the primary attack vector is client-side exploitation via a crafted PDF. No specific malware family could be identified.

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.
  • 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.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
077bd1093760b9e04948da7ea2bfbd3d6ad6436b72150cb351c56318f6dd7e4a		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 3730 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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