PDF malware analysis — malicious · f98f5aafdd574f48

MALICIOUS

PDF

46.1 KB

MD5: de0ef9b3c432192b9552b42f108780b0 SHA-1: e8ab47f9fbec6b61e45afbb49cd3ad4dd9ed3351 SHA-256: f98f5aafdd574f4810c0719e8fee531902ac0eb9dceaf5df27bee467cf785cb2

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by a machine learning classifier and ClamAV due to obfuscated JavaScript content. The embedded JavaScript stream is the primary indicator of malicious activity, suggesting it's used to download and execute further malicious code. The XFA form and general PDF JavaScript heuristics further support this. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 0.9588

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded URL info EMBEDDED_URL

One 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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `022d1e8ce4e6f7fd779b56d459784a95cf7504aaa826d20aa443e269c576b358`	pdf-javascript-stream	PDF /JS object 12 at offset 0xA1E3	4534 bytes

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