Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8d888241f28838…

MALICIOUS

PDF

1.4 KB
MD5: cc0136c4550ef888c1e1e8364da2f3e2 SHA-1: fd35cafd15284d430ed0b52901fe61901297994b SHA-256: 3b8d888241f2883887872b527d62791d105078dd540a98d292ac4b8c111aa37f
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2009-4324 exploit targeting the media.newPlayer functionality, which is often used to trigger JavaScript execution. The presence of unescape() further suggests obfuscated JavaScript intended to download and execute a secondary payload, as detected by ClamAV as Pdf.Dropper.Agent-7251422-0.

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-7251422-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7251422-0
  • 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
9a7cee13b4634e7ce33eae29a2311421af61f4ea8021c02260ae8897e7a29642		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1266 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
0c85bc860fd9df597dd184e3e7e7c93282004464bf201843d81601cdfa68b550		 pdf-javascript-stream PDF /JS object 111112 at offset 0x48B 272 bytes

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