Malicious PDF — malware analysis report

Static analysis result for SHA-256 974f29ddf2d7594d…

MALICIOUS

PDF

852.5 KB Created: 2009-12-17 23:53:16 +08:00
MD5: c68afa3e260bf78454007f7377650c9d SHA-1: aac9a5c0887e31e44d7521d893de7563973b9aa2 SHA-256: 974f29ddf2d7594dd7957a9ba4a1cc90ced251409b8825a69c7570616b9511ec
188 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204.001 Malicious Link

This PDF file contains embedded JavaScript that utilizes the unescape() function, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE-2009-4324 (media.newPlayer) strongly suggests exploitation of this known vulnerability. The presence of JavaScript and the exploit firing point to a malicious PDF designed to deliver a second-stage payload. No document body text was available for analysis, but the technical indicators are sufficient.

Heuristics 9

  • 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.Exploit.Agent-18243 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-18243
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0042_000.js
b1dbab694b56cd9badd94bd2d3e368c5fb26772f0b272a3ca68d5762bff3bcdc		 pdf-javascript-stream PDF /JS object 42 at offset 0xD4A2D 5209 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).

Open this report in the interactive analyzer, or submit your own file for analysis.