PDF malware analysis — malicious · 8b9a07e5c60912b2

MALICIOUS

PDF

2.8 KB

MD5: 2a146b1407492821da2496b9506d9398 SHA-1: 88f27a3515f322038bbfaa4f931e6af10632e8cd SHA-256: 8b9a07e5c60912b296aff64c2603c90939782de4685c915689e592fbd3f7cd80

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical ClamAV detection of 'Pdf.Exploit.Agent-19285' strongly suggests exploitation of a known PDF vulnerability. The presence of obfuscated JavaScript streams further supports the likelihood that the script is designed to download and execute a malicious payload. The document body content is unreadable, so the rationale is based on the technical findings.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-19285 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-19285
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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
`javascript_obj111611_000.js` `e3aae1c4476eb49b4b067ec508240ce115925290ef3098eb1a258e39bae473f9`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `591719b83018804fc9e75901f4c19f1c3449ad546c75bd3d68f4c09fdeb7a5d7`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	3284 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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