PDF malware analysis — malicious · 2d5d6c95d8657ef5

MALICIOUS

PDF

5.0 KB

MD5: fdd19cedf5930681bf1e990fffdf4a90 SHA-1: a80d61984c3c5066edbc473541e6b1728de53968 SHA-256: 2d5d6c95d8657ef57a9405f212fb89c471e0d81ec4964f8473155b0fa56572cd

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript and a Flash object (exploit.swf), both of which are commonly used to exploit vulnerabilities. The ML classifier strongly indicates maliciousness. The embedded JavaScript stream, identified as 'javascript_obj0017_000.js', likely contains obfuscated code designed to exploit a PDF vulnerability and download a secondary payload. The presence of 'unescape()' calls further supports this, as it's often used to deobfuscate malicious scripts.

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` `9b9c21b9e7c2489645f2d8100489597d5459730292cebc9619b96404a112ac80`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D4	1503 bytes
`javascript_obj0017_000.js` `68f95adfdfdcd40698eeeac5c6704e31c39b1354e1cd1a390e0287c6510de7f9`	pdf-javascript-stream	PDF /JS object 17 at offset 0xB67	1697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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