Malicious PDF — malware analysis report

Static analysis result for SHA-256 869822d1b136bf52…

MALICIOUS

PDF

230.0 KB Created: 2010-01-18 10:39:37 +08:00
MD5: b0c32346bdff89824346e1bddcf5f58c SHA-1: 45f477d1291fe6f8f0d5335d93a2573b8e9614ed SHA-256: 869822d1b136bf523d7b14a070cb735ae0d9e490ec8626fdda0a65eace890b12
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic indicates that the file exploits a known vulnerability in Adobe Reader, specifically related to the media.newPlayer API, to execute this script. The script likely serves as a downloader for a second-stage payload. The embedded JavaScript and the exploit trigger are the primary indicators of malicious activity.

Heuristics 5

  • 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. (identified after JavaScript deobfuscation)
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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)
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
legacy_pdfkit_stage_000.js
42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74		 deobfuscated-js string-concatenation normalized Acrobat API aliases at offset 0x673 126 bytes
objstm_0026_00.bin
380e8b2f6fb714ab4033a71d74a4dbc0024397a82657c3f7f5ceb0a9206fc78a		 pdf-objstm-decoded PDF /ObjStm 26 0 obj (inflated) 306 bytes

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