PDF malware analysis — malicious · 802b4ab0fcceb7ca

MALICIOUS

PDF

3.8 KB Authoring application: ö"vÐ^ZalÍwîp)è8Ò÷F

MD5: ed566782628f6adf4c26e28fcb2940b6 SHA-1: b2f48a658c28ec7bc543573c85e0702419a59b0a SHA-256: 802b4ab0fcceb7ca4f4720ca8702d16b04910c3ebc8d9aea99a5bf3a9fe83843

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample was flagged as malicious by an ML classifier with high confidence. It contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF is also encrypted and uses an /OpenAction to hide its payload, a common technique to evade static analysis. The embedded JavaScript, named javascript_obj0007_000.js, is likely responsible for executing the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

Encrypted PDF carries /OpenAction — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/OpenAction). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8698df2dd1e3fb775fbcc656cc82ed71edab311e16cdae2397bb85fb269d4d3c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2EA	2113 bytes

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