Malicious PDF — malware analysis report

Static analysis result for SHA-256 99745322a5a73b8b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-02 22:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 586792bf1353b15c0560fb214bf8ecfe SHA-1: c35bb25468313cc85caa59e4af1114f17e5d6b91 SHA-256: 99745322a5a73b8b95581b648492cae5cd1726dc5ee143212353a6098279e90c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to suspicious domains, and heuristic analysis indicates it functions as a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7848

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://kuzutuzo.ru/award?keyword=is+haruki+murakami+good PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5fea1bd574d5f.pdfIn PDF document text
    • http://rollernefritmassage.xyz/42051853437ag5k.pdfIn PDF document text
    • http://moneymaya.site/annihilation_book_ending_explaineds2new.pdfIn PDF document text
    • http://tixshopclub.space/fesiwezalemilogijewq5j3.pdfIn PDF document text
    • http://fishland.store/13607200554k6mc6.pdfIn PDF document text
    • http://se-mrush.com/53705356786gv0x2.pdfIn PDF document text
    • http://goodxday.xyz/ansible_aws_s336ng3.pdfIn PDF document text
    • http://top-agent.ru/937413941239eb7b.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/45095777898.pdfIn PDF document text
    • http://itasda.online/lamajivijebalarejilivrsvw.pdfIn PDF document text
    • http://pokemonrivals.online/riduxuzovewasov6dhu.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/ebf2e785e.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/how_to_clean_the_krups_coffee_maker.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/subway_flatbread_sandwich_nutrition_facts.pdfIn PDF document text

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