PDF malware analysis — malicious · 8cbaaddf826903cf

MALICIOUS

PDF

2.5 KB

MD5: 873e5588f5c6922d52c2220d73c99dd1 SHA-1: f37e48cbb5d40e944ecf405c7dfef30575314160 SHA-256: 8cbaaddf826903cfc16b6c8e14574c2db2613350cd99c694cc4f7ffe735014be

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript streams, with one stream exhibiting high-confidence `eval()` and `String.fromCharCode()` calls, indicating obfuscated code execution. The presence of these JavaScript actions strongly suggests the PDF is designed to download and execute a secondary payload. The obfuscation makes it difficult to determine the exact nature of the payload or a specific malware family.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `b6a77b0dc0c68b94d006381e8336f12f33686af3f1f311746cb6fdfabba70862`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111712_001.js` `fad1fc341ef373e0ddf88e340eb115839f31db6b8f640ef28de5f6dae8e71672`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x247	2977 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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