Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7d50d6a98a67ce…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: cd814ffac7b52c073643706c83db707c SHA-1: 12d94ef160c2f9178ef66f9e36a72a9f53134455 SHA-256: cb7d50d6a98a67cecee2e91bbf019e6cde7c09c8df517d88e85e74cceffa56ae
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV detection and high ML classifier score strongly indicate a malicious PDF. The presence of XFA forms and AcroForm buttons with action triggers are common vectors for PDF exploits. The embedded artifact, a decompressed PDF stream, likely contains the exploit code. The specific ClamAV detection name 'Pdf.Exploit.Agent-36874' suggests a known exploit, likely targeting a vulnerability to achieve arbitrary code execution.

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
f72a480601c21cec629a769c299aafa4e3ecca8d2e93c22395daca44f6bb9782
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1432 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).