PDF malware analysis — malicious · 1bb96dd5558a3406

MALICIOUS

PDF

1.6 KB

MD5: 1fc775f78c2ec45d153a58617200077f SHA-1: c81c1b48ca4c9bc5a9e0130f66759d32e9066120 SHA-256: 1bb96dd5558a34061a23b2db23c588edd761348896a74dbf7bd885d4f587d2ca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ClamAV detection for Heuristics.PDF.ObfuscatedNameObject further supports its malicious nature. The embedded JavaScript stream, named javascript_obj0009_000.js, likely contains obfuscated code designed to execute malicious actions, such as downloading a second-stage payload. The specific obfuscation techniques used, like eval() and String.fromCharCode, are common in PDF-based malware delivery.

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` `3dac87dc0a7e2dd1f7105a8e284fab619753c897ee14b1c334d6d674010ed747`	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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