Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e67d438c9c4fc9…

MALICIOUS

PDF

1.4 KB
MD5: 1b6aef5c200a53c664776d9fce283ca2 SHA-1: b34cd7a86aa8222be14861b6f8a03d6becf33d9e SHA-256: c2e67d438c9c4fc9070946cbbabb06cf6ed4b871db4ffb20430561e283fa0fac
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious JavaScript T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer object. This vulnerability allows for the execution of arbitrary code. The JavaScript is obfuscated, but the presence of unescape() calls and the specific exploit trigger indicate a malicious intent to compromise the user's system.

Heuristics 5

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111111_000.js
e9fd74fcf6f00b425677696e9803798c2d68fb656643439324e3287427d1597d		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1281 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
javascript_obj111112_001.js
848ed546522f17e5999ffbb0f11e98dfa5533bc6fb8f1212173b76f3315ad198		 pdf-javascript-stream PDF /JS object 111112 at offset 0x489 263 bytes

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