Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6999fa5d9b19ee…

MALICIOUS

PDF

798 B
MD5: ae18c0e69a723ab606b5abbcfaf6817d SHA-1: 0af3a5c437039335efa85df3b38828020b040d09 SHA-256: 2a6999fa5d9b19eed21f3b1aef9c8186b4e131718ffb2195bd9125263f95dd95
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 a command-line interface command. This command attempts to echo a VBScript payload to a file named 'm.vbs'. The VBScript itself is embedded within the PDF stream and is designed to be downloaded and executed from the URL http://92.63.103.92/e/tmp/m.vbs. The script payload is obfuscated, but the overall intent is to download and execute a second-stage 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://92.63.103.92/e/tmp/m.vbs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000006f.bin
ad55c8e83a5896a04b2012c676820daeab2b84cc539e444c6366e79f55a571c5
pdf-embedded-script PDF decompressed stream script payload at offset 0x6F 63 bytes