PDF malware analysis — malicious · e68603d7825684a8

MALICIOUS

PDF

32.9 KB

MD5: a6049631fff7bb3befe5bf7c29e379c7 SHA-1: 1af2e6109ab99d95d11ea85b3dfde2ce581fcc54 SHA-256: e68603d7825684a89298f1720d7e676a0e3f146fb36942d27e970e6e23b8cc76

216 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking T1204.002 Malicious File

The PDF contains embedded JavaScript and a Flash object (KBESAEut.swf), both of which are commonly used to deliver exploits or malware. ClamAV detected the embedded SWF file as a known exploit kit. The ML classifier also strongly indicated maliciousness. The presence of these embedded artifacts suggests the PDF's primary purpose is to exploit vulnerabilities or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
`KBESAEut.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1520	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` `3a077fbbf7412264092f16cbbf43493895011fe14a6d9beb6c891a7d7e3f0df0`	pdf-javascript-stream	PDF /JS object 6 at offset 0x146	3754 bytes

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