PDF malware analysis — malicious · 4e74cd66b3ab8d9a

MALICIOUS

PDF

3.1 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Acrobat Distiller 8.1.0 (Windows)

MD5: 3062741508f03e11af8ff0398975b49a SHA-1: b89aae76dfe61b3ef4d1674ee68061bc05ae4567 SHA-256: 4e74cd66b3ab8d9a0339bcb987ca1c2d662499033eff133c842160ad9b60da21

70 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The ML classifier strongly indicates this PDF is malicious. Static analysis detected embedded JavaScript and an embedded file, suggesting it's designed to exploit PDF vulnerabilities and download a secondary payload. The presence of XFA forms and AcroForm buttons with actions further supports the likelihood of exploit execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures

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