Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cd1510ef9b3995…

MALICIOUS

PDF

50.3 KB Created: 2021-02-24 23:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4e026d95f5f397fa90b0a2b9f1324aa2 SHA-1: 74c970c4d6e0e3d32a4b0dc4f5b93c678f83e5c1 SHA-256: 05cd1510ef9b3995fb6eafcf5a43a699016a9700628d07cb6c144ad951f959ae
122 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with several pointing to known malicious redirector infrastructure. The ML classifier also flagged the document as malicious. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host malicious links rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=basic+addition+facts+worksheet+2nd+grade In PDF document text
    • http://natikolom.site/1157102925885dk2.pdfIn PDF document text
    • http://feedbacrnz.space/keniru236ry.pdfIn PDF document text
    • http://fastpeysistem.online/jefatige7es5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5ffe413a1479b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403824/normal_5ffa55c6d9192.pdfIn PDF document text
    • http://wiinorama.space/kixedumozuropaf5yrbe.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/GgikjcD/semam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff81500afba8.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/ibgipiU/bitlife_life_simulator_review.pdfIn PDF document text
    • http://astropsychology.site/tipos_de_virus_informaticos_caballo_de_troyayj3r6.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/aTmXjCX/pottery_wheel_classes_nyc.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/kijasubu_zosud_wepamususudeti_rijimujofun.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/h0fS0gd/xenowerk_mod_apk_android_1.pdfIn PDF document text
    • http://wudobez.rf.gd/xijodipekupulezejet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/no_fodmaps_list.pdfIn PDF document text
    • http://lanurifif.rf.gd/simple_human_soap_dispenser_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/42400996413.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/bumop.pdfIn PDF document text

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