Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4057f3346b744a2…

MALICIOUS

PDF

55.8 KB Created: 2021-03-02 11:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b6884b793692351693a0bad3e2dd754c SHA-1: bd4a6f8ee655225f203522ea027010a924e22729 SHA-256: e4057f3346b744a29fbef198735c42ad7afca590cd62487d7feaa0ce1196cdc6
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6618

Heuristics 3

  • 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://baarspo.ru/award?keyword=nac2h3o2+full+name+in+chemistry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5fca2b301924b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_5fefeeaec3ce2.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/where_do_chicks_come_from_book.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/lupajixejukogewodegep.pdfIn PDF document text
    • http://desokore.medianewsonline.com/16513727700.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/pqtJhev/boat_race_cockney_slang.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/17480054531.pdfIn PDF document text
    • https://xonedapu.weebly.com/uploads/1/3/4/6/134654428/zinodikexazivem_moziwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_601e30c27be07.pdfIn PDF document text
    • https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/4b538.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/4N9iaji/coloring_of_five_nights_books_suitable_age.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/Ijgyic9/verizon_cloud_restore_contacts_iphone.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/78630401815.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/where_is_atp_stored_in_muscle_cells.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/how_to_cook_a_whole_chicken_in_air_fryer_oven.pdfIn PDF document text
    • https://netupujen.weebly.com/uploads/1/3/4/8/134868598/sotumugos-powibupulan-xafali-vibajuna.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/intelligent_control_systems_an_introduction_with_examples.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/pipejofofodo.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/how_to_reset_netgear_range_extender_ex6100.pdfIn PDF document text
    • http://zevusup.atwebpages.com/how_to_apa_cite_davis_drug_guide.pdfIn PDF document text

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