PDF malware analysis — malicious · 1d9593a5f5b9cd88

MALICIOUS

PDF

3.4 KB

MD5: 95a7731d0c01bacd6caaa782372c3c36 SHA-1: a9bd8eb659ef6ab582778b219d77de37eb54ea65 SHA-256: 1d9593a5f5b9cd8854869641400d7153ade44f8ce6e9938c54cb45bc2360e2e6

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and String.fromCharCode, suggesting obfuscation and dynamic code execution. The primary function of the script appears to be downloading and executing a second-stage payload, as evidenced by the suspicious extracted artifact 'javascript_obj0006_000.js'. The document body is unreadable, so the rationale is based solely on the script's behavior.

Heuristics 5

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_obj0006_000.js` `7ae489bd88b9062204dceede1c01fb7f5fe14d20621007390f79ca49efe2ceba`	pdf-javascript-stream	PDF /JS object 6 at offset 0xA05	1323 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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