Malicious PDF — malware analysis report

Static analysis result for SHA-256 5547b828bd9876fb…

MALICIOUS

PDF

2.7 KB
MD5: 66ecd7579530fda2d6018fef01271e37 SHA-1: 8c861e292213d4ebc446ae8af5f7289f3ab89b0c SHA-256: 5547b828bd9876fb12d59bc4731422b56733e2b769bc0a39ddf83aa76bb57ed0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains a launch action that targets cmd.exe, indicating an attempt to execute commands. The embedded script payload and the presence of a URL pointing to a Windows executable (dnn.exe) strongly suggest this is a dropper mechanism. The script likely uses WScript.Shell and Adodb.Stream to download and execute the payload from the provided URL.

Heuristics 5

  • Launch action critical PDF_LAUNCH
    PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
  • /Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target — references a known-dangerous executable (cmd, PowerShell, etc.).
  • ClamAV: Win.Trojan.Dropper-132 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Dropper-132
  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cercania.net/images/dnn.exe