PDF malware analysis — malicious · 3074b6a2ee7ffcec

MALICIOUS

PDF

799 B

MD5: 03e340770fb1bb660e148f8912c46780 SHA-1: 6b52d20b2885cc1f877afd4f01b9192cfb4d0f58 SHA-256: 3074b6a2ee7ffcec763bfc7f8fbb755c9721b0b32a36e43d42092c782f58cf90

150 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.003 Windows Command Shell

The PDF contains a launch action that executes cmd.exe, which in turn echoes a VBScript payload to a file named 'm.vbs'. This script is designed to download and execute a second-stage payload from the embedded URL http://5tniza.cz.cc/b2/tmp/m.vbs. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://5tniza.cz.cc/b2/tmp/m.vbs

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0000006f.bin` `ad55c8e83a5896a04b2012c676820daeab2b84cc539e444c6366e79f55a571c5`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x6F	63 bytes

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