Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a09d9beb6910962…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 833055dda24b50ed7265d5a7ed2de837 SHA-1: 27ed436f16a59ab18b319944ccda1ed9f04edec5 SHA-256: 0a09d9beb69109625b7ae73a9da81fdfcb2a47a41ed495ecf8aee1835c9c66bf
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is a PDF document identified as malicious by ClamAV and an ML classifier. Heuristics indicate the presence of an XFA form and an AcroForm button with an action trigger, suggesting an exploit targeting PDF vulnerabilities. The embedded artifact 'stream_001_off000008ed.bin' likely contains the exploit payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36874
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000008ed.bin
1af65c95f5b3f6d19d18beab18a68e0cf48439cd02eb6200bc4b668201438490		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1446 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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