PDF malware analysis — malicious · 580045348d698301

MALICIOUS

PDF

76.7 KB Created: 2010-03-07 01:18:23 Authoring application: Zt6087 (via JEK9T)

MD5: 39a11aac788da053a8111e3fff008101 SHA-1: 1eb5c4b59a0065956546d525aed3e03395a8e408 SHA-256: 580045348d6983018ffb7d8061f18d516d12f8cd361092194fbab11959fd4398

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 JavaScript stream utilizes `eval()` and `String.fromCharCode()` for obfuscation, a common technique for hiding malicious code. The primary heuristic firing is PDF_EVAL, suggesting the execution of arbitrary code. The extracted artifact `javascript_obj0007_000.js` is also suspicious. The overall intent appears to be the execution of obfuscated JavaScript, likely to download and execute a second-stage payload.

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.
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_obj0007_000.js` `c38193bbaae01c320c7ff9e2a4310441392b4ff8907654865e2563a5591c50cd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23B	77287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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