Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c009c8145500871…

MALICIOUS

PDF

155.5 KB Created: 2021-03-06 19:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bb6a3ec8d200828955ee2d419bcda5d2 SHA-1: 03c44fa0f40f3479ee74669685be6863106be55c SHA-256: 6c009c81455008716fea4e23898776bf7b4c064c5d571df10bef23ed64a71c1a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with a high concentration on disposable hosting, suggesting a link farm designed to redirect users. One prominent URL, 'https://resalured.ru/award?keyword=who+is+dale+earnhardt+jr+married+to', is presented in a way that mimics a search result, likely to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://resalured.ru/award?keyword=who+is+dale+earnhardt+jr+married+to PDF link annotation
    • http://dsv-trening.ru/formato_para_analisis_de_riesgo_por_puesto_de_trabajoa4wgv.pdfIn PDF document text
    • http://romeoplanet.club/34354221936i2qrn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd8cb4615c39.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/hp_photosmart_7525_printer_user_guide.pdfIn PDF document text
    • http://shoop-fe.ru/26998318015cmg2o.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/zutonotu.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_change_day_in_casio_g_shock.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/frankenstein_mary_shelley_audiobook_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5ff31950796ac.pdfIn PDF document text
    • http://sibuvre.com/301829665857lewq.pdfIn PDF document text
    • http://ilkertr.shop/crochet_pattern_for_super_chunky_woolwk6by.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/how_to_clean_the_brush_bar_on_a_dyson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac8e92c-ecb4-4d5d-979c-314bf74ee7ef/what_kind_of_bread_can_i_eat_on_an_anti_inflammatory_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c785c1-86b1-425b-a427-174952ed62ce/suntrust_bank_locations_in_virginia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ff073a-d92f-4f9c-9c6b-08a8ade992ff/what_does_a_platinum_workkeys_score_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b589f2f-079c-4956-9e55-ce78f266868d/the_elephant_man_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2184a7f2-78c5-423a-accd-ce8d80f26412/behringer_eurodesk_sx3242fx_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d5c4cd-9795-49c7-9be0-addab66e8a80/63885782954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424e0ddd-ade3-4e9a-ba20-f451ecf35f3b/logic_mathematics_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90b5edb-24e3-4008-89d1-2a3ebd819622/what_does_smh_stand_for.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000253d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x253D3 5156 bytes
SHA-256: 6c82a43445a291e8d68b59130d852d5c43cdb6082725246c9f1f54445112f002

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