PDF malware analysis — malicious · 76a9046968e0199d

MALICIOUS

PDF

4.1 KB

MD5: 8cca1cb060eb88ebf45c86cf4546d788 SHA-1: 513533805500d6e69e3be188852c29e8cd5ccadc SHA-256: 76a9046968e0199d55cf05b5d72d73e716926dffca2bd1188e54dc244f0c0bca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and likely used to download and execute a second-stage payload. The ClamAV detection name 'Pdf.Dropper.Agent-7274029-0' further supports this dropper functionality. No specific family could be identified due to the obfuscation.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7274029-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7274029-0
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_obj0013_001.js` `c533a7301e4c5ad2de423853fc955ea923c68e294ef7832aadd7881e975fcb6f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `d334cb733d75886738baf5c33c6c4064dfdb000e892a37c034bbcabb895d0647`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3593 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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