PDF malware analysis — malicious · c20cf852a42e2906

MALICIOUS

PDF

289.4 KB

MD5: 327b3944d3de97eb1df7217484f45ad3 SHA-1: 5a1bd07dcda94b1c874ca7a29d93bc15ea06b8ea SHA-256: c20cf852a42e2906a50ea41d5e284203e8e3aaae48443896032c3473a532b7c0

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains an embedded script payload, indicated by multiple high-severity heuristics including PDF_EMBEDDED_SCRIPT_PAYLOAD and ML_NYX_PDF_MALICIOUS. The script, identified as embedded_pdf_script_000482d7.bin, is likely designed to execute malicious commands. The DOC BODY excerpt suggests the script may use cmd.exe and WScript.Shell to perform actions, potentially downloading and executing further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_000482d7.bin` `6eae64c2e790450a31043b19748fa683859d9d4f33ea30c9a56b366a840be487`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482D7	296228 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 1 long hex-escaped blob(s).

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