Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3003bb646724d4e…

MALICIOUS

PDF

7.2 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 88aad0a6955144834744f3c35eaa71b1 SHA-1: bf5bf91aec081b058325dc4011562d2d3dc1e67c SHA-256: a3003bb646724d4ef64533aa8db2a77fe4f50a27e580dee3e897834be3af3acb
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating obfuscation and dynamic code execution. ClamAV detections (Pdf.Exploit.Agent-35587) confirm its malicious nature. The embedded JavaScript is heavily obfuscated, but the presence of eval() and the ClamAV detection strongly suggest it's designed to download and execute a secondary payload, a common technique for initial access.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.
  • 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_obj0013_001.js
784a253a74772e4fc3375736015c3437a500cd2d7ae9c93aec8734bc5eb991b3
pdf-javascript-stream PDF /JS object 13 at offset 0x3D7 5758 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35587
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s).