PDF malware analysis — malicious · 76c95b73825ef503

MALICIOUS

PDF

1.6 KB

MD5: a7a21773bd15e17ed0bf6ad8fcd159e9 SHA-1: 80c85eaeeeb82127c7f8a462302884f85da7df9c SHA-256: 76c95b73825ef503db22e585eb32cd69239221e82b0aa60376a3f7771aae7f72

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that attempts to save a file named 'wMix.hta' to the Windows Temp directory and then likely execute it. The script also contains a URL pointing to 'http://192.168.178.22:8080/wMix.exe', suggesting it's a downloader for a malicious executable. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a dropper family.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7384027-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7384027-0
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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://192.168.178.22:8080/wMix.exe

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `40a2b4373fc86550c8c0700dcabd1cdafd0cbf57b9a3052b072c73219ece9d64`	pdf-javascript-stream	PDF /JS object 1 at offset 0x43A	181 bytes
`javascript_obj0001_001.js` `674d24d5636dbb773ffa836a99d02e847241d744169dcbb672b330432b52aad7`	pdf-javascript-stream	PDF /JS object 1 at offset 0x43A	84 bytes
`embedded_pdf_script_000002a9.bin` `ed5d3b7e427b0e52c0adc1cce2ad03ae637a9b13b543091a1fa4a9d7e909ade5`	pdf-embedded-script	PDF raw stream script payload at offset 0x2A9	961 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 1 eval/decoder/string-building token(s).

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