PDF / .MLW malware analysis — malicious · 59365b9be3a6cc5e

MALICIOUS

PDF / .MLW

3.9 KB

MD5: 817d27f629cecd7ca115fdc25bbd5d65 SHA-1: 3677243b568d5d557bd47f06b67304fb6ded3709 SHA-256: 59365b9be3a6cc5e9408e389c56cb61f51c71037d8f6b53bda4d68193038fc26

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_FROMCHARCODE. ClamAV also flagged it as Heuristics.PDF.ObfuscatedNameObject. The embedded JavaScript file, javascript_obj0031_000.js, is likely responsible for executing the malicious payload. Due to the obfuscation, the exact nature of the payload and its execution method cannot be definitively determined, leading to a lower confidence score.

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0031_000.js` `c40cadff6c03394c1ec5712fd8f5676a267815203ebea7d560be1b3923cdb7f2`	pdf-javascript-stream	PDF /JS object 31 at offset 0xE7	16105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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