PDF malware analysis — malicious · 54b098bfbf5934ad

MALICIOUS

PDF

31.4 KB

MD5: 4fb35a447307afac15790af590e21a6a SHA-1: 2624503f2dd3f014888bca6861d27c09cfeb1851 SHA-256: 54b098bfbf5934ad24e6decfd6246667df0fb5ac0e8789e93037d6253e667cb5

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and a Flash object (TyPWoIJRMY.swf), indicated by multiple PDF heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA. The presence of eval() calls and the extracted JavaScript files (javascript_obj0006_000.js, legacy_pdfkit_stage_000.js) suggest the execution of malicious code. This code likely attempts to download and execute a secondary payload, a common technique for initial access.

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 0x1293	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` `76c93762563b3f7c54c8a2e86559e3959d891286f630a925c7183cbbdec664cc`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3658 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` `f2c9dfa501dbe50cc6595a3f3644b3505332eab7e23ae0e7fbccfe798d831a44`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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