Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c6b64682b92851…

MALICIOUS

PDF

1.5 KB
MD5: b5716c468fb6eadb01c3d8ff9d23ee2d SHA-1: 196f668d7227ff956dfd443440253a00d62c18d6 SHA-256: f1c6b64682b9285143c4c62e9583c991546e29f9ddd707efc2eec885169222d6
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting the JavaScript is used to exploit this flaw. The presence of a ClamAV detection for Pdf.Dropper.Agent-7322862-0 further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common dropper behavior.

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-7322862-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7322862-0
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111711_000.js
80d0531cfcfd5f75493ff3aeefeb43b6a7281077b49972807cd2675ac97439ae		 pdf-javascript-stream PDF /JS object 111711 at offset 0x197 294 bytes
javascript_obj111712_001.js
0044b9526adf5fa4bae3bdb42dc5b64b26f661540ccf6113c31eaba085ed46d2		 pdf-javascript-stream PDF /JS object 111712 at offset 0x2B3 1978 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
javascript_obj111713_002.js
27f3b109bc63c59e2a8399ab722d92c7b35227805ca771c1aa8cfa43e62747e6		 pdf-javascript-stream PDF /JS object 111713 at offset 0x54D 79 bytes

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