Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55b789c0c8e1298…

MALICIOUS

PDF

43.5 KB Created: 2021-02-26 06:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b94c048f4004209f54ad6e81faf50ab6 SHA-1: bf19ff94872a28868b38c9fd2203dea46331518d SHA-256: b55b789c0c8e1298ec9789f4704bf40b8679cab562a8a7a34dff39dca9741f33
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8245

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://crophysi.ru/award?keyword=english+grammar+check+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402520/normal_60302030946c4.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/2013_dodge_charger_leather_seat_covers.pdfIn PDF document text
    • https://cdn.sqhk.co/dilijenaka/gghaxdl/space_programs_all_around_the_world.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5febb57376aa9.pdfIn PDF document text
    • http://medway24.com/369141628444iyym.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/P3hfxjj/bovelonamaze.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/wd_tv_hd_media_player_firmware_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_601d846fb8367.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/is_there_a_reset_button_on_canon_printers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fdc5b3b722af.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/oxford_grade_4_maths_book.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jgVjghg/pasero.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/fDvXWjb/duweruwofaju.pdfIn PDF document text
    • http://znasila.ru/diary_of_a_wimpy_kid_2020_new_bookc7uaw.pdfIn PDF document text
    • http://fringigejy.site/kugiresuta1dme8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5ff6a9f64f478.pdfIn PDF document text
    • http://8gusevshop.space/milady_barber_textbooki3v6s.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/badrinath_telugu_movie_songs_naa.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/words_their_way_spelling_inventory.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/15619408101.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/xowupuwakosumepirilolena.pdfIn PDF document text

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