Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b12f131c3a8b1c0…

MALICIOUS

PDF

67.6 KB Created: 2021-02-27 11:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e4aa4c1f258cdcb6408e4c1d05be646e SHA-1: 09d06d8cb46251568a80b4308cade55c3de4c18b SHA-256: 9b12f131c3a8b1c0a04ddc0714b01632075dad0d18175f93f7249f3241ebf5da
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to a product review and authoring application, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8544

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://xajibur.ru/aws?utm_term=tp-link+tl-wa850re+300mbps+universal+wifi+range+extender+review PDF link annotation
    • http://rinujajija.getenjoyment.net/machine_learning_vs_artificial_intelligence_quora.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/mr_coffee_12_cup_programmable_coffee_maker_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_6006a1fc2ee19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5feb80ad21807.pdfIn PDF document text
    • http://vquest.website/retailing_management_9th_editionphlt2.pdfIn PDF document text
    • http://helpforteam.com/1800_shadow_run_apartmentshcyep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_601ce4cc8bb29.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/21715559518.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/how_to_set_up_home_theater_with_projector.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428342/normal_5fffbeef543fa.pdfIn PDF document text
    • http://tameeniraq.com/among_us_tips_for_impostorwug4w.pdfIn PDF document text
    • http://hellochildren.online/joxoduwajojinebadodikzz1r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sigobija/59700771841.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/caracteristicas_de_los_personajes_del_libro_el_dador_de_recuerdos.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/albinoni_adagio_piano_sheet.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/girlboss_sophia_amoruso_quotes.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/how_to_use_power_probe_iv.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/xerox_7855_drum_cartridge_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/reservation_form_function.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_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 6388 bytes
SHA-256: d6aca2a83f264afd42fe9a5c8ac2ea9951fd8662e15aa6e80726485daffe2c9f

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