Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6b9ad312c1bac2…

MALICIOUS

PDF

6.6 KB
MD5: b7fa19b2690aead747f4777f4ca5d533 SHA-1: cf7eedacfa4687088b4c568bef8c19f6584aa6c9 SHA-256: db6b9ad312c1bac2cb5b44f22c19c45b445cf00e8a5febba5db5b91c2d1db2f7
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream, named 'javascript_obj0006_000.js', is likely responsible for the malicious activity. The ClamAV detection 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The script's purpose is to download and execute a second-stage payload, though the exact mechanism is obfuscated.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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
javascript_obj0006_000.js
42ce1bd2e639be0af290b3f873b983352ff1093e3d54c0e5f005bad5b15cf235
pdf-javascript-stream PDF /JS object 6 at offset 0x143 137519 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).