Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6492e4c115db194…

MALICIOUS

PDF

45.0 KB
MD5: 98ce021905de1203b5e10a8f68f00189 SHA-1: b4bd1beb1559e708d604e8cf833cced1e6907ac2 SHA-256: a6492e4c115db19405f42652bfe040c591e7131868dc0613cc4b84b4f9995311
104 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.001 PowerShell

The PDF file contains embedded JavaScript and triggers a critical heuristic for the CVE-2010-2883 Adobe Reader CoolType SING font exploit. The embedded JavaScript is likely used to download and execute a second-stage payload. The presence of XFA form elements and ASCIIHexDecode filters further supports the exploitation vector. While specific URLs are present, they are not directly indicative of malicious activity on their own, but the exploit and script execution are strong indicators of malicious intent.

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
4cfef49b4baec4c1e1cc776471da0a3958b0a2902891ade5beba6d1230a37f34		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 4012 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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