PDF malware analysis — malicious · b0f45beb67704c69

MALICIOUS

PDF

31.7 KB

MD5: de4bfecc641a2a43fe77c9e0e56c2444 SHA-1: bf68acaac314b8daa5de4e24fac500d5eec91fa5 SHA-256: b0f45beb67704c69c9321c130f87f2d77b4295fc97bacd2fc46b882c13bf4145

216 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking: DLL Side-Loading

The PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection (Pdf.Exploit.Agent-35955). It contains embedded JavaScript and a RichMedia (Flash) object, which are commonly used to deliver exploits. An embedded SWF file named 'XKoFmsKxLVbXVe.swf' was also extracted, further indicating a multi-stage attack. The presence of these components suggests the document is designed to execute malicious code upon opening.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
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
`XKoFmsKxLVbXVe.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x14A6	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `f883160af3d2669d00a66fd4cc86f34705df25ebbcc2342c10b838f23bbff3cc`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E	3598 bytes

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