PDF malware analysis — malicious · 2e4951070a7d8c65

MALICIOUS

PDF

33.1 KB

MD5: f570a85cf4938f3241fd006dcb61c1d6 SHA-1: 803b4cb141daa07a841cbe310ea4512bb34e7305 SHA-256: 2e4951070a7d8c652eb6a7670e7e1ea352b225a37e7277cf9bc2a0c9507704a0

216 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript and a RichMedia (Flash) object, both flagged as malicious. ClamAV detected the embedded SWF file as a known exploit kit. The ML classifier also strongly indicated maliciousness. The likely attack pattern involves exploiting a vulnerability within the Flash object to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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
`HhqPZeTXfJuC.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x15E8	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` `701b4646e86fa5be509ccaf9188635cbb192fb9083611e3706b6899064e1d1bd`	pdf-javascript-stream	PDF /JS object 6 at offset 0x146	3876 bytes

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