Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ea13683625abe2…

MALICIOUS

PDF

1.4 KB
MD5: c3997afd2ec93b0a57b7f854dfaf49df SHA-1: 9cdc5ac7ec2cf35a681337b557d1d007a13849d0 SHA-256: 59ea13683625abe231d7a814e95dcbdfcfbc9913c41394a17950ddba8da014d4
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains embedded JavaScript that is triggered by the 'unescape()' function and exploits the CVE-2009-4324 vulnerability via the media.newPlayer object. The JavaScript is likely responsible for downloading and executing a second-stage payload. The ClamAV detection 'Pdf.Dropper.Agent-7263124-0' further supports its malicious nature as a dropper.

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-7263124-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7263124-0
  • 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
e849cce74ba1e999dcd96d5590976dfc01ccc1c90e9c584ad93db5d29439c41e		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1262 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
b24b42c8ef96822bdfbe49bbce27451a1d371914b0d0e998a606839e2cc75c18		 pdf-javascript-stream PDF /JS object 111112 at offset 0x486 252 bytes

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