PDF malware analysis — malicious · 92c38efac8ce653d

MALICIOUS

PDF

1.6 KB

MD5: 3a3b7948d08aab1152c08eb708ab8bcf SHA-1: e49711e418d054ef400459ef2568e4a8e74fcdf3 SHA-256: 92c38efac8ce653d9b610cd4ad2c3e7dab1379bfd78e72eff5ec3603c54fc528

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL heuristics. The JavaScript stream, named javascript_obj0009_000.js, likely contains code to exploit a vulnerability or download a secondary payload. The ClamAV detection further confirms its malicious nature. The use of eval() and String.fromCharCode suggests an attempt to hide malicious code execution.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `3edaec2a3f6b4d2c024da36271a929c5539a67ba59f642669d2cd9a9a91b225c`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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