Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b4b9748f223fe3…

MALICIOUS

PDF

1.4 KB
MD5: 94c5f9087ea6e79297151b8517afe5cb SHA-1: c364a3176582bc87e1ba088f27d3bc704c256120 SHA-256: a4b4b9748f223fe331752df7db55eec92c915e115befa27664b5e08bed31c437
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of a known vulnerability related to media player functionality. The ClamAV detection further confirms its malicious nature as Pdf.Dropper.Agent-7289571-0. The presence of JavaScript and the dropper classification strongly suggest the file's purpose is to download and execute a secondary malicious payload.

Heuristics 6

  • 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)
  • ClamAV: Pdf.Dropper.Agent-7289571-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7289571-0
  • 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
669c3839cee4452c67172a99f74bccdfc6432f7573e6f1c025be2b19a2202a6f		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1240 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
fc7772430d1b7fbe13e20f5d6d303342f2a22ebd8ca1d9bc000b31833bf50539		 pdf-javascript-stream PDF /JS object 111112 at offset 0x481 248 bytes

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