PDF malware analysis — malicious · 7bd6783e7b396045

MALICIOUS

PDF

4.3 KB

MD5: 7c3033fee508eb8ac7c6dadb939a9b11 SHA-1: bc8dda25e894211f23b478791de1747b12b56b00 SHA-256: 7bd6783e7b39604550b3d93aac3b83d0fb325c14eee4b694a6d47574f31b0a69

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript and a Flash object, both of which are commonly used to exploit vulnerabilities. The JavaScript is heavily obfuscated and uses an eval() call, indicating it's designed to execute malicious code. The presence of an embedded SWF file further suggests an exploit attempt. The primary function of the JavaScript appears to be downloading and executing a secondary payload, as indicated by the obfuscated code and the PDF_JS_EXPLOIT_CLUSTER heuristic.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
JavaScript action low 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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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.

Filename	Kind	Source	Size
`exploit.swf` `09da31fcb002129249bb529a7f84709739a96f62781db5f4c6d9bf6e4308eb15`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1	102 bytes
`javascript_obj0017_000.js` `e9cfa3fee500cdc168e908cedfaccf4ac14e34eeae13a900d90d00f20d69d237`	pdf-javascript-stream	PDF /JS object 17 at offset 0x5EB	2360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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