PDF malware analysis — malicious · 9539dadee5c00ce2

MALICIOUS

PDF

4.3 KB

MD5: a160187c1ff46f99cb3bc7e164abb19d SHA-1: 97aae798fa40f0c66bf9aa6aad6be3c9e1867469 SHA-256: 9539dadee5c00ce27aa369c96b1c24147d069ae7ebc250b1319f5732e1b202de

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is likely obfuscated and uses eval() to execute arbitrary code. The extracted artifact 'javascript_obj78056_000.js' further supports the presence of JavaScript. The primary function of this script appears to be downloading and executing a second-stage payload, a common technique for initial access.

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_obj78056_000.js` `e976929afbca0e62a7ef955b67f9a8f12f6aae467a54d4658958792673eb701a`	pdf-javascript-stream	PDF /JS object 78056 at offset 0x139	8299 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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