Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0364f4aab07f44b…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: d0320bbc9d960b453dd5b14157986501 SHA-1: 1e4a871fb35518ee850934b87c94fe2fe69c36e5 SHA-256: b0364f4aab07f44b79e9f144156f961ec99f1c59efa09d71bb539e8d8d9b8fab
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.001 PowerShell

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The presence of XFA forms and AcroForm buttons suggests the PDF is crafted to trigger exploits. While no specific script was extracted, the 'Pdf.Exploit.Agent-36874' detection implies the PDF contains embedded exploit code, likely designed to download and execute a secondary payload.

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
533c0c0860a66ffcdf9518964e0781499e09b8f38d4fa91abc13ed94ecd334c9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1467 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).