PDF malware analysis — malicious · ff0993bba84a912a

MALICIOUS

PDF

244.7 KB

MD5: 8a64dcc56ef774e2d9bf938ce363940b SHA-1: 1df4fe106591291f3876d183113ef8ec55f9189c SHA-256: ff0993bba84a912a0cc944ab498a1ed5a2180c19829a3f4e64ed355ca991465e

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains an embedded script that is configured to launch cmd.exe. This script is likely responsible for downloading and executing a secondary payload, as indicated by the ClamAV detections of a trojan dropper. The PDF_LAUNCH and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics confirm the presence and execution of malicious code within the PDF.

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_0003ccdb.bin` `eae403cb26fa41a1ec10ac136a438e503877ddf3dfb40f2908abbcac3e2a7da8`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CCDB	249030 bytes
Detection ClamAV: Win.Trojan.Dropper-133 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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