PDF malware analysis — malicious · decd5daa6c14426b

MALICIOUS

PDF

13.0 KB

MD5: 1dd796c9da98d2edcd475ed8a2e38b27 SHA-1: c0a41dcffdafc885551277f213714464c21276ac SHA-256: decd5daa6c14426bd0a7a64d1ea3a569b5a425f3586827011480c74e0f4650d4

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier and contained embedded JavaScript. The JavaScript stream, named 'javascript_obj0006_000.js', is indicative of a downloader or dropper. The presence of PDF-specific heuristics like ASCIIHexDecode filter further supports the malicious nature of the document, suggesting it's designed to deliver and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `cbd5aa3b0b341379e6d022bc822d358c6709d4d96b969920ddda076a17155f8a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	14047 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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