Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f213eb8f520cfde…

MALICIOUS

PDF

1.4 KB
MD5: 40f82847b746d0f78d77f72de9e72a4b SHA-1: 15e754c12ad948539c24bd4f0c5ecebf23d57a4e SHA-256: 3f213eb8f520cfdeb93b51ca3b50b2e732c43ac0914d02a2c43b58c33fa37669
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2009-4324) related to media player handling. The presence of JavaScript streams and the unescape function strongly suggest that the script is designed to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature. The document body is unreadable, so the rationale is based on the technical findings.

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-7253185-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7253185-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • Suspicious extracted artifact medium 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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111111_000.js
adac7ca4620e457f89c351d9d1d0de544939dd042e41aa68ed8640253b40e445		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1279 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
5d8a8235651e37bede67eda9152230dc1cd42c3179db6c44329738c2d653ed6f		 pdf-javascript-stream PDF /JS object 111112 at offset 0x48F 251 bytes

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