Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a02dc9603aed4e…

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6
MD5: 3a10a3568a105e50bfc6e85e21f88e51 SHA-1: 093527ba1e5e431192fcb03e4819f8fb651c9f69 SHA-256: f8a02dc9603aed4ed6c0821a5a91f6ed3a3cfe627e744eff7c24f36f02516776
108 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1204.002 Malicious File Execution: User Execution

The file is identified as malicious by ML classification and ClamAV, which specifically flags it as 'Pdf.Exploit.Agent-36874'. The presence of an XFA form and an AcroForm button with an action trigger suggests an attempt to exploit PDF vulnerabilities. An embedded, decompressed PDF stream artifact further supports the likelihood of a malicious payload delivery mechanism.

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
03287156daaa6a75b1e24dfcc354fb1133f560964c3f47463c4d5bd007051f48
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).