Malicious PDF — malware analysis report

Static analysis result for SHA-256 571d4c6bd29c03e9…

MALICIOUS

PDF

1.4 KB
MD5: 3271df23b89e2bf87873b9a961d2e56b SHA-1: 87141d4dfd85df7e65ae69a0634d829fb4e96793 SHA-256: 571d4c6bd29c03e9af268263fb08ab92bf598aa9d6dcf4f8b87cca4cea83b33b
160 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 interpreter is then used to download a file from 'http://iamjuza.googlecode.com/files/dropper.txt' and likely execute it. The embedded script uses 'Scripting.FileSystemObject' and 'WinHttp.WinHttpRequest.5.1' to facilitate this download and execution process, indicating a downloader or droppper functionality.

Heuristics 4

  • Launch action critical PDF_LAUNCH
    PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
  • /Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target — references a known-dangerous executable (cmd, PowerShell, etc.).
  • 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.
  • 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://iamjuza.googlecode.com/files/dropper.txt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_000001ff.bin
3c5394e20de9731efed397cdcc243026657aec4ba7543a5415ca7044db805b63
pdf-embedded-script PDF decompressed stream script payload at offset 0x1FF 260 bytes