Malicious PDF — malware analysis report

Static analysis result for SHA-256 268bd03f6e1b3a95…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 9b10ad6670363eee72a00218c932df8a SHA-1: eb5246b24bf1e6b63ca1a4388274dcfc540618a1 SHA-256: 268bd03f6e1b3a956852046633aa7fcca34d3556f25aa8cf306a2004bc556f9e
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36874' and a high ML classifier score. The presence of XFA forms and AcroForm buttons suggests an attempt to embed executable content or exploit mechanisms within the PDF structure. The decompressed stream indicates a potentially obfuscated payload. The overall evidence points to a malicious PDF exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000008ed.bin
0ba1bf172ad03a9f13723cae149fb9dcdf4b33ed44086e335117042e96960f6a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1439 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).