Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0f24c7a11261d8…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 96d26ea8b0bb2b4fc2a9b49b799053e8 SHA-1: cd0c46fefcb5bfcd5d1d9b212653184fabbfcdd4 SHA-256: 1e0f24c7a11261d891051a4bb7b7c1097a3a1e71f171043848dbf2dd7c3a6469
108 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874. ML classification also strongly indicates maliciousness. The presence of XFA forms and AcroForm buttons suggests an attempt to exploit PDF vulnerabilities. While no specific script was extracted, the overall indicators point to a PDF-based exploit designed to deliver a malicious 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
1e2a6e5b6a7a674cb9ab179b585b60c1cc4b85c2d42ae818d1a3206147c2d98e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8ED 1456 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).