PDF malware analysis — malicious · 0577cda90bd96f0d

MALICIOUS

PDF

32.4 KB

MD5: 31c85f7a9ff53e9f568d2fc4d04a1a76 SHA-1: 0eb9bbed20aaa824795206c880efc04982a46b2d SHA-256: 0577cda90bd96f0d4255c50bd300296444956f29e9e1d4b875be38fb35c4ee1f

216 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript and a Flash object, both of which are commonly used to exploit vulnerabilities and deliver malicious payloads. The embedded JavaScript is obfuscated but likely responsible for initiating the exploit chain. The extracted SWF file, detected by ClamAV as a potential exploit kit component, is the likely second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

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
`QQEQeJiQqAdFjx.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1312	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` `2ebfdc562bb56ec334f2f831b2eda3bfc725c8217d8b41c121ce98f47b3bc8eb`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12E	3296 bytes

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