PDF malware analysis — malicious · 9d669bbf63088cdd

MALICIOUS

PDF

33.4 KB

MD5: 3563b733d0396f5b5ce1a106544056e5 SHA-1: ca6c879610c6b29ce2474d35d4f26b157dbbbae2 SHA-256: 9d669bbf63088cdd70c94c69648d314204eb3083eba85b06d167e946561df6e4

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating malicious intent. It contains embedded Flash content (yaoylkrxpJoD.swf) and a JavaScript stream (javascript_obj0006_000.js). The presence of these embedded objects, particularly the Flash file detected as a potential exploit kit by ClamAV, suggests the PDF is designed to exploit vulnerabilities or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
Suspicious extracted artifact info 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`yaoylkrxpJoD.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x16C2	27931 bytes
Detection ClamAV: Swf.Exploit.Kit-513 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `9e717d95ab1877546222ade10af44410c4d0f4ccc9a1c9eac0da49d48aacce60`	pdf-javascript-stream	PDF /JS object 6 at offset 0x148	4015 bytes

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