PDF malware analysis — malicious · 416ac6993c371228

MALICIOUS

PDF

60.1 KB

MD5: 9683b80d44e27d2ab90265625ea1845f SHA-1: 0f5b49ed1f1df1b908dc9d4fe2488abd60e49743 SHA-256: 416ac6993c371228c57e68e4fee51b3416854e358d3b4d0caf9b2c5711aa070a

274 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged as malicious by multiple high-confidence heuristics, including ML classification and ClamAV detection. It contains embedded JavaScript and an embedded document (doc.doc). The embedded JavaScript is likely responsible for executing the embedded document, which is a downloader. The ClamAV detection on the extracted artifact confirms its downloader nature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7254167-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7254167-0
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 high 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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`doc.doc` `a8b7eccc03848d160ca1049676c2cd34313939ff5f863869794cb61d6a58e5af`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x33E	30208 bytes
Detection ClamAV: Doc.Downloader.Generic-6698421-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`javascript_obj0001_000.js` `b981ab0323c15eb3c75acfa5a267898e9552bf2a52e290d8d4003f08c68560a3`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	57 bytes

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