PDF / .TXT malware analysis — malicious · 071aa37e0ce18f44

MALICIOUS

PDF / .TXT

71.9 KB

MD5: 41069efbd51e4ed734391ef2cf9fc3af SHA-1: 17259e6bf14ef300ec26f3ac29ed2e73a7b63d7a SHA-256: 071aa37e0ce18f442d8175d4ce50f03df1d907163250f0fbfd9647ccffc1c1db

108 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, indicated by multiple heuristic firings and the presence of a javascript_obj0012_000.js stream. This script is likely designed to exploit a vulnerability within the PDF reader to achieve code execution. The embedded URL, http://www.bitstream.com, is a potential indicator of a command and control server or a download location for a secondary payload. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.5168

Heuristics 4

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.
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://www.bitstream.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `0ae7e7451d189fb4a1f8bb8f4f128133182a953cde9d6c07957c4e07082873b4`	pdf-javascript-stream	PDF /JS object 12 at offset 0x109C6	1065 bytes

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