Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbaf0bd714bfa19…

MALICIOUS

PDF

802 B
MD5: 7f991233b30878f273d4db552b643f03 SHA-1: 20c1f1920141e69d40ac00a1b051e19c5b460d9f SHA-256: bbbaf0bd714bfa19f8e34e8f1da6c8da18446ab9f96046b1ee2a269290dc8a8a
120 Risk Score

Malware Insights

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

The PDF contains a launch action that executes cmd.exe. This command is used to echo a VBScript payload into a file named 'm.vbs' and then likely execute it. The VBScript payload is obfuscated but appears to download and execute a second-stage payload from the embedded URL http://troka.info/new_aaa/tmp/m.vbs. The confidence is high due to the clear execution chain and embedded URL.

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://troka.info/new_aaa/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