PDF malware analysis — malicious · f48771af84963e3c

MALICIOUS

PDF

5.1 KB

MD5: 22f7aef342d7532afd3abfedcf4cfeed SHA-1: 4cee8ce12306829d860a8d0f5485fc2fa966fe44 SHA-256: f48771af84963e3c6ba24fde9d46e9c5a6811a0ab7d399072a679dedb1a72462

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() to execute arbitrary code. The extracted artifact 'javascript_obj0263_000.js' is likely the source of this obfuscated JavaScript. The primary function of this script appears to be downloading and executing a second-stage payload, though the exact details are obscured by the obfuscation. Due to the obfuscation, the exact nature of the payload and its ultimate destination cannot be determined with high confidence.

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_obj0263_000.js` `7e144f9768a6096ca4ecfca81c025c74d4279df421a48a7148757dee9ede476b`	pdf-javascript-stream	PDF /JS object 263 at offset 0x135	8359 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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