Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8ab19329644b8a…

MALICIOUS

PDF

1.2 KB
MD5: 02aa579aadcb8cb49b8cb0904a0d87e0 SHA-1: 680f0164e0b5d3d640a97b0869f0273dbdfe9a42 SHA-256: 1a8ab19329644b8ab476fa6f38a3ec0f67af579a695c91493c49baa044ef5526
200 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 executes cmd.exe, which in turn downloads and executes a payload from the URL http://localhost/exe/payload.exe. The embedded script is obfuscated but appears to be responsible for the download and execution process. The presence of a launch action and embedded script strongly indicates a malicious intent to deliver a secondary payload.

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 with parameters '/Q /C cd %temp%&echo (function(a,b,c' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://localhost/exe/payload.exe