PDF malware analysis — malicious · 4143d9baef165c60

MALICIOUS

PDF

31.3 KB

MD5: eb587b66da295efeec8265dfb55f9eca SHA-1: 58e55a00a99204a73afe4f3aae856f5e40c40085 SHA-256: 4143d9baef165c60c5d9f312af828c38968012aa1a39a5e4a7c60a0b7faf81d2

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1071.001 Web Protocols

The PDF contains embedded JavaScript and a Flash object, both of which are commonly used to exploit vulnerabilities. The ML classifier strongly indicates maliciousness. The embedded artifacts 'ZdhyXAVZwLWfPiH.swf', 'javascript_obj0006_000.js', and 'legacy_pdfkit_stage_000.js' suggest the PDF is designed to download and execute additional malicious payloads, likely exploiting browser or PDF reader vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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
`ZdhyXAVZwLWfPiH.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x11F4	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` `b1b5ec6679d7b21047800ac790bff6d0b6c00cc9440389554a754ed7ea37d6f6`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3484 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `189333bb9c4f2b74669c0a6f7b6a3be937d839eebfd522ed5d5845fe584a8f8b`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2147 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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