PDF malware analysis — malicious · 3e8c661ba6885535

MALICIOUS

PDF

29.8 KB

MD5: 2f66cd361717e7cc01467961225fcbc1 SHA-1: 211712dc5c73129e2e311777dc8b61a277eb540a SHA-256: 3e8c661ba6885535a21ead6382c89fafde8efaa421737fa072b439fcc1279a06

106 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking T1059.001 PowerShell

The PDF file contains embedded JavaScript and RichMedia (Flash) content, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The unescape() call suggests obfuscation within the JavaScript. The presence of embedded files, specifically a JavaScript stream and a binary file, points towards a multi-stage attack. The embedded JavaScript is likely responsible for executing the embedded binary or initiating further malicious actions.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0016.bin` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xC1B	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` `107a1cba6c12a87039ead4730540db1b29e418a83c5ba549f5f0f7b8ff26b2b1`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	1993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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