Malicious PDF — malware analysis report

Static analysis result for SHA-256 be678de20fd9f9df…

MALICIOUS

PDF

68.0 KB Created: 2021-06-02 06:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ea7fa38e0e4829732a1ed34d846b78b SHA-1: e45dab24531948112bf33d1d777b3351a3ff1f55 SHA-256: be678de20fd9f9df403ada21ca6d0318eef20dc4586a163bedc39c30da40ebf4
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'infrive.ru', suggesting it functions as a link farm to distribute malicious content or conduct phishing. The PDF's structure and embedded links align with techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/pbw?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B1%25D0%25B5%25D1%2581%25D0%25BF%25D0%25BB%25D0%25B0%25D1%2582%25D0%25BD%25D0%25BE+%25D0%25B2%25D0%25B7%25D0%25BB%25D0%25BE%25D0%25BC%25D0%25B0%25D0%25BD%25D0%25BD%25D1%258B%25D0%25B9+hill+climb+racing+%25D0%25B1%25D0%25BF%25D0%25B0%25D0%25BD
    • https://static.s123-cdn-static.com/uploads/4385030/normal_6003d28d2efc9.pdf
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5fed9ee170221.pdf
    • https://luvimemisa.weebly.com/uploads/1/3/4/6/134681541/bisilizabizetov.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_5fdbd9ffe93fa.pdf
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/garovo_sagir_jumaduviredesez_pomosura.pdf
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fd3a30e53161.pdf
    • https://cdn-cms.f-static.net/uploads/4505839/normal_602777b0d0986.pdf
    • https://cdn-cms.f-static.net/uploads/4425915/normal_6010aa903363d.pdf
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5ffba76cc9179.pdf
    • https://wukidonevopa.weebly.com/uploads/1/3/7/5/137516219/segabofuzase.pdf
    • https://cdn-cms.f-static.net/uploads/4449399/normal_5fd0bcd6a6ef7.pdf
    • https://lemoximut.weebly.com/uploads/1/3/7/5/137516849/vukukevazoxojiz_fovetikeletewa.pdf
    • https://cdn-cms.f-static.net/uploads/4471273/normal_605c037410f27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gibuwodebu.pbworks.com/f/worksheet_4.5_predicting_double_replacement_reactions_answers.pdf
    • https://uploads.strikinglycdn.com/files/b51ce470-b322-495f-a3cf-6ed7e46de7aa/67573054589.pdf
    • http://bujolajoxek.pbworks.com/f/parotuzogogewof.pdf
    • http://siruzosu.pbworks.com/f/testamento_profetico_de_benjamin_solari_parravicini.pdf
    • https://uploads.strikinglycdn.com/files/b7097fde-3581-4c32-8cf1-a90ae2fa6978/minn_kota_terrova_80_amp_draw.pdf
    • http://kelivesas.pbworks.com/f/minecraft_ragdoll_mod.pdf
    • http://taxexuwej.pbworks.com/f/foroselerekes.pdf
    • http://pamotekegopa.pbworks.com/f/how_do_i_reset_my_fanco_fan_remote.pdf
    • http://midevodimu.pbworks.com/w/file/fetch/144453951/navy_awards_manual_1650.1.pdf
    • https://uploads.strikinglycdn.com/files/f9d3bd8c-e16a-49c1-a1d7-64b6d1f68daa/54498329064.pdf
    • http://fulusivijomu.pbworks.com/w/file/fetch/144440979/22533075890.pdf
    • http://kelivesas.pbworks.com/f/54668895089.pdf
    • https://uploads.strikinglycdn.com/files/fd1c9fd1-5510-43d2-8e2e-932ae092356b/best_earbuds_wireless_2019_uk.pdf
    • http://tusoxefum.pbworks.com/f/ingenuity_inlighten_cradling_swing_and_rocker_manual.pdf
    • https://uploads.strikinglycdn.com/files/71837814-b3b0-4d3b-8367-670e8d3d0818/bissell_revolution_pet_pro_carpet_cleaner_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44b.bin
8f2f4a9370015fc8e7208762a116613abfd2673cb5cdb3274993f88daa345d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 7044 bytes

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