Malicious PDF — malware analysis report

Static analysis result for SHA-256 0197b3e46772a4dc…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 662979351a8805601315a7eeef3a7294 SHA-1: ff382a702aadec078b65f59e6b795d7c4ce9d353 SHA-256: 0197b3e46772a4dc0fbe6df051b5d4f7e864e689348e116912d55d5c9fc86a1a
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious PDF

The file is identified as a malicious PDF by ClamAV and a machine learning classifier. It contains XFA form elements and an embedded, decompressed stream artifact, indicating it's designed to exploit PDF vulnerabilities. The presence of XFA forms and embedded content suggests an attempt to execute malicious code or download a secondary 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
a0a257059fc1f6c9a69f1bb5f2d707446019411529c87e05752f14d04ff321fb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1431 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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