PDF malware analysis — malicious · ed6582d52043f3a5

MALICIOUS

PDF

4.3 KB

MD5: f88a7564aa612146b3b1fd3b729f2fdf SHA-1: ecbc51a1cc1951b38f2bf4df5248d5cc7abfa1a5 SHA-256: ed6582d52043f3a54f3542e993bbd4f21df47a6b0142c6a7baa7eb7ed1512af4

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF contains embedded JavaScript and a RichMedia (Flash) object, both flagged as suspicious. The ML classifier strongly indicates maliciousness. The embedded JavaScript stream, named 'javascript_obj0017_000.js', is likely responsible for exploiting a PDF vulnerability and executing further malicious code, potentially downloading a second-stage payload. The presence of 'exploit.swf' also suggests an exploit attempt.

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
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
`exploit.swf` `84e218f03072a6dd67a832a6e1f7772d4789395cccab4416598f43b0ecef9588`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1	831 bytes
`javascript_obj0017_000.js` `6c4c288717ee189d0486a6e20d81fed107bcca7186d05954b3bdc069be8b026f`	pdf-javascript-stream	PDF /JS object 17 at offset 0x8C4	1659 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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