Malicious PDF — malware analysis report

Static analysis result for SHA-256 8128d10c554cd0f2…

MALICIOUS

PDF

24.9 KB Created: 2019-04-30 03:13:48 +01:00 Authoring application: mPDF 5.7 First seen: 2026-05-08
MD5: 507af8966fda2f6a092390d4bbc7867e SHA-1: 7859b49550512fcc401c7bfece295e860f1e387d SHA-256: 8128d10c554cd0f2f81fcafbfe60c903cf8e3a92c431ca858c38bbada4988aac
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous links to other PDFs suggests a tactic to manipulate search engine results or distribute content through a link farm. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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/3a09a05a08a08a09/The-Nature-of-the-Nonprofit-Sector-by-J-Steven-Ott.pdf In PDF document text
    • http://muicuiu.dumb1.com/8a09a09a05a06a06/Regulatory-Waves-Comparative-Perspectives-on-State-Regulation-and-Self-Regulation-Policies-in-the-Nonprofit-Sector-by-Oonagh-B-Breen.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a07a04a06a03a05/Eating-Italy-A-Culinary-Adventure-through-Italy-s-Best-Meals-by-Jeff-Michaud.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a08a05a03a01a06/It-Happened-in-Italy-Untold-Stories-of-How-the-People-of-Italy-Defied-the-Horrors-of-the-Holocaust-by-Elizabeth-Bettina.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a05a08a09a07/Celebrating-Italy-Tastes-amp-Traditions-of-Italy-as-Revealed-Through-Its-Feasts-Festivals-amp-Sumptuous-Foods-by-Carol-Field.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a00a07a04a05a00/Nilla-s-Big-Adventure-by-Sue-Barbetta.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a01a06a07a05a02/Systematic-Catalogue-of-Plants-Growing-in-the-Open-Air-in-the-Garden-of-Thomas-Hanbury-F-L-S-Knight-of-the-Order-of-St-Maurice-and-St-Lazarus-and-Officer-of-the-Cross-of-the-Crown-of-Italy-Palazzo-Orengo-La-Mortola-Near-Ventimiglia-Italy-by-Anonymous.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a00a07a04a04a00/A-Pebble-in-His-Shoe-by-Francine-Barbetta.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a00a07a04a03a09/Barbetta-the-laughing-goat---and-other-tales-by-Laura-Caterina-Benedetti.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a00a07a04a04a09/Supa-Barbetta-E-Altre-Storie---La-Cucina-Delle-Valli-Valdesi-by-Andreas-Beschorner.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a00a09a05a03a01/Ukiyo-e-by-Gian-Carlo-Calza.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a06a03a09a04/Think-from-the-Heart-Love-from-the-Mind-by-Gian-Kumar.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a08a02a03a08/S-u-ng-i-i-kh-p-th-gian-2-by-James-A-Michener.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a02a05a02a07a01/Fengrin-der-Zwerg-Die-Balior-Chroniken-by-Gian-Franco-Messina.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a09a05a04a04/The-Saint-of-Bleecker-Street-Vocal-Score-by-Gian-Carlo-Menotti.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a09a01a07a05/Into-the-Bermuda-Triangle-Pursuing-the-Truth-Behind-the-World-s-Greatest-Mystery-by-Gian-Quasar.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a07a02a01a07a03/Forging-Nonprofit-Alliances-A-Comprehensive-Guide-to-Enhancing-Your-Mission-Through-Joint-Ventures-amp-Partnerships-Management-Service-Organizations-Parent-Corporations-and-Mergers-by-Jane-Arsenault.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a06a09a05a06/Nh-t-K-Ho-n-To-n-C-Th-t-C-a-M-t-Ng-i-Anh-i-ng-B-n-Th-i-Gian-by-Sherman-Alexie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a03a02a08a05a08/Sector-5-by-Richard-DuBois.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a03a07a03a07a08/Sector-Seven-by-Matthew-Spychala.pdfIn PDF document text

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