PDF malware analysis — malicious · 223d3ddc417ad8cb

MALICIOUS

PDF

28.5 KB

MD5: 63f18b000c4736201ee3345b4ceef718 SHA-1: b85bbb64cb9c6c8b4da5cffa5abb0229e7bd5649 SHA-256: 223d3ddc417ad8cb385a98d7875ebe9e467988fff13233191dda4b891eab9ed3

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file exhibits multiple high-severity heuristic firings, including PDF_RICHMEDIA and PDF_EVAL, indicating the presence of potentially malicious content. An embedded JavaScript stream and a Flash object (SWF) were extracted, suggesting an attempt to execute code or exploit vulnerabilities. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file. The presence of these embedded artifacts points towards a delivery mechanism for further malicious activity.

Heuristics 7

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

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

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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
`KOuKWkxlCLGrA.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x6D2	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `40f06266b77c058d7a6af1a11c7bd7992cb4e9c47061123e9798a7ab674c20ee`	pdf-javascript-stream	PDF /JS object 6 at offset 0x15B	150 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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