PDF malware analysis — malicious · 4c06a1844284cc00

MALICIOUS

PDF

31.3 KB

MD5: c1dc086a1fd2947e9b32c5def8264da9 SHA-1: 490d12f2b7806623b7f7f7a43d6aeca739339cc9 SHA-256: 4c06a1844284cc00f9e112f1bab79b82e58310654d38850d23e23ab2f514a834

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object (TyPWoIJRMY.swf), indicated by multiple PDF-specific heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_RICHMEDIA, and PDF_EVAL. The embedded JavaScript, specifically 'legacy_pdfkit_stage_000.js', appears to be responsible for loading and executing the Flash content. This chain of execution is a common technique for exploiting PDF vulnerabilities to deliver secondary payloads.

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 0x11F5	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` `254cd507152e7092ace5565d467d37ae1d84c229ee35c9f4dbb9de748e3663dc`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3500 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` `4a963521de868eb91f4584e29f6b56749f1c749d22b741f3048599c0ee65f80e`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDA7	2152 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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