Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cf19fb8752a230…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 6cc3299f88a2ae75add0169318801a4d SHA-1: 7e9a55040f014a553cc32f92a3a9c69ac65e3565 SHA-256: 60cf19fb8752a2300fcaf30a8640404655c23d3fcc1cccbd450918af8f94111d
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36874' and an ML classifier indicating maliciousness. The presence of XFA forms and AcroForm buttons with action triggers suggests an exploit is embedded within the document structure. The ML classifier's high score and the ClamAV detection strongly indicate the file is designed to exploit a vulnerability for client execution.

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
a794124c1658049fe3eaec0a98d8c9f28d7589386ec8cc9789a22ed064590693		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1449 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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