Malware Insights
The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_UNESCAPE rules strongly suggests that the JavaScript code is obfuscated and uses eval() to execute it. This obfuscated script, named 'javascript_obj0013_001.js', is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The confidence is slightly reduced due to the inability to reconstruct the exact payload URL or execution command from the provided evidence.
Heuristics 5
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eval() call high PDF_EVALeval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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unescape() call high PDF_UNESCAPEunescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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_obj0013_001.js34b254b4ab1d922101c38717792bfc30fe8c8747fc5325d843b41fd8e8cb711a |
pdf-javascript-stream | PDF /JS object 13 at offset 0x3D4 | 70178 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 4 eval/decoder/string-building token(s).
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