Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfdb9ab18439cdf…

MALICIOUS

PDF

44.7 KB
MD5: ea113fcb63d726d97cab2dfdc9487fba SHA-1: d84b0d37f2992cb1d7b8de11f00475c6650d1c13 SHA-256: 1cfdb9ab18439cdf6f53bbaa979acc401ce2edd7c7734f36864178b3d404c138
106 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. The critical finding of CVE-2010-2883 (Adobe Reader CoolType SING font exploit) strongly suggests the document is designed to achieve arbitrary code execution. The embedded JavaScript stream is likely responsible for downloading and executing a secondary payload, although its exact function is obscured by obfuscation. The presence of XFA form elements 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
fbd0fd42edb37fc3366bcdbc3ce378fe567573a98a81428dcc62e17d5b6b4e33		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 3670 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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