PDF malware analysis — malicious · 4423974f1c960865

MALICIOUS

PDF

244.5 KB

MD5: 7e66f187a0f979d139cec4d541142b16 SHA-1: 87cf7046030917041d36822dc563bd4e1346380a SHA-256: 4423974f1c9608656a3a90d9522a891333a99d86127f98150273942ec5b4a4ab

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a launch action that executes cmd.exe with a command to create a file system object. This indicates an attempt to download and execute a malicious script. The ClamAV detection 'Win.Trojan.Dropper-133' further supports this, classifying it as a dropper. The embedded script payload and the launch action targeting cmd.exe are the primary indicators of this malicious behavior.

Heuristics 6

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 with parameters '/c echo Set fso=CreateObject("Scripting.FileSystemObject"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Win.Trojan.Dropper-133 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Dropper-133
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0003cc5e.bin` `b6d0e19ae923e2fc841bc793fd6c669170c72a1aee4790503fb948a80512476b`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CC5E	248931 bytes
Detection ClamAV: Win.Trojan.Dropper-133 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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