PDF malware analysis — malicious · 3894bb5a23df120b

MALICIOUS

PDF

30.7 KB

MD5: fb79c4f462118d8a8e9e217e092991f3 SHA-1: 6c420fa8e4e2241fb33365f757fa0eac9928a513 SHA-256: 3894bb5a23df120bf33bd940d22e461ee17aefa6f1513f9ca3bc3c9d5bba0b3b

256 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including ClamAV with the signature Pdf.Exploit.Agent-35955. Static analysis revealed embedded JavaScript and a RichMedia (Flash) object, indicating an attempt to execute code or exploit vulnerabilities. The presence of these embedded artifacts suggests the document is designed to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 8

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
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` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x10CA	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` `960c5fe2af5e2dfc17f365085acf57a135d3042f68a926b8573e1bea3177c3f4`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14E	2751 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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