Pdf.Dropper.Agent-7274771-0 — PDF malware analysis

Static analysis result for SHA-256 78ede013bba5752a…

MALICIOUS

PDF

8.2 KB
MD5: 9ef8fb2a81f7e0a8d0688b463fb58cde SHA-1: 555c6e852fcabe54e2c89ffd30858288728f2a02 SHA-256: 78ede013bba5752ac5b24ba321faee2499f80ce23185e9b141e212f7bb1733fe
194 Risk Score

Malware Insights

Pdf.Dropper.Agent-7274771-0 · confidence 95%

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

This PDF file was flagged by ClamAV as Pdf.Dropper.Agent-7274771-0. Static analysis revealed embedded JavaScript with eval() calls and String.fromCharCode usage, indicative of obfuscation. The presence of U3D content and related CVE indicators suggests exploitation of a vulnerability in Adobe Reader's 3D parsing capabilities. The primary function appears to be the execution of malicious JavaScript, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

Heuristics 7

  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • ClamAV: Pdf.Dropper.Agent-7274771-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7274771-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (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. (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)
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0012_00.bin
9f9d288ccb281ba27dfe2ea4cfe5e529d5bbf5cb9f04e0aad0cdaade7a963033		 pdf-objstm-decoded PDF /ObjStm 12 0 obj (inflated) 315 bytes
u3d_00_off00001043.bin
e29cd62c2da6c352128680576917c23ab7afe0c651296174d6d96b8e1e6dfa41		 pdf-3d-stream PDF U3D 3D stream at offset 0x1043 356 bytes

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