Malicious PDF — malware analysis report

Static analysis result for SHA-256 533c95b4a3c03776…

MALICIOUS

PDF

3.8 KB
MD5: 1294c4bd207fa27b8cc93ab070e74e74 SHA-1: 329a28371632f5da72f95721c88faf21d411ebd6 SHA-256: 533c95b4a3c037762cfb33ede2faf3462cc3356d42f54a58364d5787ee6c581d
138 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains a malicious URI that leverages cmd.exe to disable the firewall and then attempts to download a file named 'ldr.exe' from the IP address 81.95.146.130 via FTP. This indicates a downloader pattern aiming to fetch and execute a second-stage payload. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Win.Trojan.Exploit-79 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Exploit-79
  • PDF URI references command interpreter path high PDF_DANGEROUS_URI_COMMAND
    PDF contains a /URI action whose target uses a mailto/path traversal shape and references a command interpreter or scripting host. This is not a normal web link and matches legacy PDF command execution/dropper lures.
  • External URI low PDF_URI
    PDF contains an external URL action
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/

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