PDF malware analysis — malicious · 622ea2abfdc60795

MALICIOUS

PDF

6.7 KB

MD5: 5fd6ccc0195725f9c5cd0066f03c2736 SHA-1: 7e607c2b9d5edc8b6b4e89b9b4da89e0195f3823 SHA-256: 622ea2abfdc607957fd9d1a2ab9f2324a0576f533b81fd372c7d939866bf7115

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to download and execute a payload from a remote URL. The ML classifier and static triage heuristics strongly indicate malicious intent. The embedded JavaScript is responsible for contacting the external URL to fetch and execute the next stage of the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

Suspicious extracted artifact medium 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.
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 URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www1.hardcleaneredd.uni.me/?os0ttlo3yw=k9ad2LHR55if7NHFr5mZoJaH4tneopyV1Khkp6mloWrendzUr5WWn5WUoJWolZaK2%2BZtpqidlZTb2dqexLiuktXK0qKli9eI

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `43ac696fee325adcb314d117dd830259ff9c3a0f6e078d305177631fda71f88e`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1D4	6075 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0005_001.js` `249d294aaf77c141fe4fbc1baa923e69b9b2bd888c96113966c67ded872020cc`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1F7	6358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).

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