Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f9d9cc001da8e3…

MALICIOUS

PDF

44.8 KB
MD5: ae248a57c6b0e951b1e18a9bb1322160 SHA-1: bb7d451858b9ab785a71eeddf8b216a1dc51a30e SHA-256: 32f9d9cc001da8e37de6bdfbbae76a2237d3afdce8ccb0b3b09d4b9feabf3f8a
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 ASCIIHexDecode filters, indicating an attempt to obfuscate malicious content. The critical finding of CVE-2010-2883 (Adobe Reader CoolType SING font exploit) strongly suggests this PDF is designed to exploit a known vulnerability for code execution. The embedded JavaScript, though not fully analyzed due to potential obfuscation, is likely responsible for downloading and executing a secondary payload. The presence of XFA forms further supports 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
e5a698cbc6a833c9eed01e9a2cc3948b2400856b954ff9cc8d49114a18cc3370		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 3796 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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