PDF malware analysis — malicious · 930b347856f3dbd5

MALICIOUS

PDF

244.6 KB

MD5: 7f6d0bdd6b5b21dc6c265d3630d3e740 SHA-1: 61c3944a7a3f84146f4017ffa13073a46e440604 SHA-256: 930b347856f3dbd5f82bbbd32697481b11dbd8ebfb96fd9ae99d446b619fe152

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains an embedded script that is executed via a launch action, targeting cmd.exe. This script is designed to download and execute a second-stage payload, as indicated by the ClamAV detections for dropper-type malware. The embedded script itself is the primary indicator of malicious intent, leading to the execution of further malicious code.

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-132 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Dropper-132
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_0003cc93.bin` `a0d6e43f8eef6b36ec65251a9347c903b8c32e399104357b20755db91dee4148`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CC93	248958 bytes
Detection ClamAV: Win.Trojan.Dropper-133 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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