Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfd5214678174df…

MALICIOUS

PDF

788 B
MD5: 958bc486cbd5d8c765db7980e5c2ceb1 SHA-1: d584a2940c90c71bbb2764ca82032c95fefd54f2 SHA-256: fcfd5214678174df5b37b82c05f8765a25bb08607928c0666f3d9d6be41d82aa
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 writes a VBScript payload to disk, which is then likely executed. The VBScript is obfuscated but appears to use 'Scripting.FileSystemObject' and 'WScript.Shell' to create and run a file. The embedded URL is likely used to download a further stage. Confidence is reduced due to the obfuscation of the script.

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://02.2m1sdzs.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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