PDF malware analysis — malicious · e8f4b6784645157f

MALICIOUS

PDF

289.4 KB

MD5: e407e9f5bbf8defaf45843022d6cd834 SHA-1: 3c5b4a448e5e8d2b12bd236f6224fa63a48d2ea4 SHA-256: e8f4b6784645157ff995d575e4259628e78f573ead569526d7175ac16d213bcb

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a launch action and an embedded script payload, flagged by multiple heuristics including ClamAV and a machine learning classifier. The embedded script, when partially reconstructed from the document body, indicates an attempt to execute commands via cmd.exe and WScript.Shell, likely to download and run a second-stage payload from a remote source. The specific command line fragment suggests obfuscation and dynamic execution.

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_000482d9.bin` `5490290740454f394b2b69cc91d4a7efab4cf6e25985e2ec6958b71ba44c7e9d`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482D9	296230 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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