Malicious PDF — malware analysis report

Static analysis result for SHA-256 745bb47c5cced7e5…

MALICIOUS

PDF

12.6 KB Created: 2019-05-02 01:02:29 +01:00 Authoring application: mPDF 5.7
MD5: 440c27dcee707240a4dd5787cd552eef SHA-1: 428406ca8259a8920bbd2043023f30d8e5822c4e SHA-256: 745bb47c5cced7e55baae5c33a35439aa9adde3b97968a1a5b16e0a921f6087b
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are marked as benign, the sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' indicate a malicious intent to manipulate search engine results or redirect users. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://muicuiu.dumb1.com/6a05a01a08a09a09/Heart-of-Darkness-Joseph-Conrad-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/1a01a08a07a01a03a07/Heart-of-Darkness-the-Classic-Novel-by-Joseph-Conrad-Classic-Books-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/1a00a05a06a07a03a00/The-Joseph-Conrad-Collection-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/1a08a02a09a08a05/Lord-Jim-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/5a05a01a08a09/Nostromo-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/5a08a00a05a03a03/Lord-Jim-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/7a05a01a01a06a01/Nostromo-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/9a07a01a00a09a08/Lord-Jim-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/4a07a09a01a02a09/Lord-Jim-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/2a02a05a07a09a05/The-Mirror-of-the-Sea-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/3a08a04a04a09/Victory-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/3a09a06a09a07a00/The-Return-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/2a09a02a02a05a09/Typhoon-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/9a09a08a04a04a03/Heart-of-Darkness-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/6a01a05a09a07a06/Heart-of-Darkness-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/5a06a07a03a06a02/The-Shadow-Line-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/9a00a05a01a02a02/Heart-of-Darkness-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/5a08a00a05a04a08/Secret-Agent-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/4a02a06a04a06a01/The-Secret-Sharer-by-Joseph-Conrad.pdf
    • http://muicuiu.dumb1.com/6a02a08a04a04/Heart-of-Darkness-by-Joseph-Conrad.pdf

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