Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bde753de48639d…

MALICIOUS

PDF

79.4 KB
MD5: 2e32c07e9119254c9805e77bafbb2570 SHA-1: a7dc6a77f985ad57260f12ff0b287e012a8443bc SHA-256: 48bde753de48639dbe00d5e4c4dc8669617ddc85538fa526f619109fdfd4110d
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript and triggers a known vulnerability (CVE-2009-4324) related to media player execution. Static analysis indicates the JavaScript is obfuscated and likely serves as a dropper for further malicious activity. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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)
  • ClamAV: Pdf.Dropper.Agent-7257269-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7257269-0
  • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
b386101e23b6bd1c02947bbc087c90d63eec7e2591ef6459720fde16cc07c7a3		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 3583 bytes
javascript_obj0008_001.js
2fd05677a054b82aaf44dba4a2b79a4ef05b4e7981619cf5da5a279437d5b8f5		 pdf-javascript-stream PDF /JS object 8 at offset 0x209 80811 bytes
legacy_pdfkit_stage_000.js
75c10722f5fb28ba52062bab75e0a13f5e4ca5bde5e5434e17aeaccef5a4d90d		 deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x101A 2564 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
legacy_pdfkit_stage_001.js
42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414		 deobfuscated-js cross-stage annotation API aliases at offset 0x1E7 81 bytes

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