PDF malware analysis — malicious · 33844f19d9f4f7f1

MALICIOUS

PDF

33.5 KB

MD5: 9c6f9ac7f8dd206c77e08016b2a3348a SHA-1: bff285bf37b5f99d4c5b48c6b47007c05b44aa60 SHA-256: 33844f19d9f4f7f10a321df526da847e674ceb30da2de1668e0d23a1d9ee324d

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded JavaScript and a Flash object (BXLQMptnSJNg.swf), which are commonly used to deliver exploits or download further malicious content. ClamAV detected the embedded SWF file as a known exploit kit. The presence of these components suggests an attempt to compromise the user's system.

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
`BXLQMptnSJNg.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1753	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` `3707a768341cb3768b5dff245a1b9ff1b12f7d52d62406a5bc89cd248c335cea`	pdf-javascript-stream	PDF /JS object 6 at offset 0x156	4123 bytes

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