PDF malware analysis — malicious · 8b2c2eac1dc0d8c2

MALICIOUS

PDF

31.6 KB

MD5: ea91ec9addf25d842c0f66092d651243 SHA-1: dae8003672c0668dbf43dd3648889765c13c338e SHA-256: 8b2c2eac1dc0d8c24ab61350d1c9dbef57dc1304fb5054f91bbcd1065dfaa28d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains embedded JavaScript and a Flash object (TyPWoIJRMY.swf), indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_RICHMEDIA, and PDF_EVAL. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript and Flash object are likely used to exploit vulnerabilities and download/execute a second-stage payload. The presence of these components suggests a multi-stage attack aimed at delivering malware.

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
`TyPWoIJRMY.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1371	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` `60c2de203226646e3721e7ac3b1a6a3d8cebabae818e48862915b19923b93241`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3880 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` `4ac59d9123b758ed2fd06009e44ea21475fa29b8cf058aee059bde31e5d7b31d`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2503 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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