PDF malware analysis — malicious · 6c4a7f3a6a90d0c5

MALICIOUS

PDF

29.8 KB

MD5: 52008a2eb4fa94dc0cdf28b72df93a25 SHA-1: 6064a70ec60ff53110e4d6b6e431ebfd729b2a00 SHA-256: 6c4a7f3a6a90d0c560e498c098bc7e502e36d147500bedec0af88e14b3b7b996

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript streams and a Flash object (SWF). The JavaScript utilizes eval() calls and appears to be obfuscated, strongly suggesting it's designed to exploit a PDF vulnerability for client execution. The embedded SWF file further indicates a complex, multi-stage attack. The primary function of the JavaScript is likely to download and execute a second-stage payload, characteristic of a malicious document delivered via spearphishing.

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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`waEUHOXaQoR.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xC1B	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `fa231c380559beb68dee1305270042289c40242e6a0eec6a5c13b382f154d4ee`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	1999 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0006_001.js` `6cb870bcee48efb7ac23fdb26cc7942286b6ba3a24f5e8065e2ee8e0b822aede`	pdf-javascript-stream	PDF /JS object 6 at offset 0x11C	30220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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