Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec6c73efc1e6bb8…

MALICIOUS

PDF

44.8 KB
MD5: 40ac6e8c5c733c56046fbf54667026cf SHA-1: 3fa8554a8675fe652bd1e239fe5c5adcff33cd7d SHA-256: eec6c73efc1e6bb869c3fae812fed42932d36f9c5d5120729659a8c28437a2ad
104 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.001 PowerShell T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript and utilizes an ASCIIHexDecode filter, indicating malicious intent. Crucially, it fires a critical heuristic for CVE-2010-2883, an Adobe Reader CoolType SING font exploit. This suggests the document is designed to exploit this vulnerability upon opening, likely to download and execute a second-stage payload. The embedded JavaScript and XFA form further support the exploitation vector.

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
28a23e1b0017993a85b67a6493f28102ffd0a4395d24444c2bf8fc06e15ad6d4		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 3724 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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