Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce0b3055b1e7e5a…

MALICIOUS

PDF

81.8 KB Created: 2021-04-27 15:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a661b755ffe8df68fb16f50f5a1b4c00 SHA-1: dce1d7e0627a7098e8d941a03e7b4ea8e53c0d18 SHA-256: 1ce0b3055b1e7e5ad166bc204fb033608b76cfc0492508268850d554c2af243e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous embedded URLs, with a prominent one leading to 'maypoin.ru', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying the PDF as a link farm on disposable hosting, designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://maypoin.ru/strik?utm_term=who+plays+the+bad+guy+in+artemis+fowl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393016/normal_606a4a3639b56.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/email_marketing_process.pdfIn PDF document text
    • http://4bochki.ru/catholic_bible_study_books_for_young_adultsgzhkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5ff58bad834e0.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/2005_toyota_camry_radio_wiring_diagram13plu.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/antigeno_prostatico_por_edad.pdfIn PDF document text
    • http://vagivosifogezer.22web.org/business_analyst_tools.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/little_fires_everywhere_season_1_episode_4_recap.pdfIn PDF document text
    • http://ersoil.fun/18198319979ii2ip.pdfIn PDF document text
    • http://weinmvc.net/hopper_app_phone_number_customer_service32g7o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5ffe4c4e63bfa.pdfIn PDF document text
    • http://avbox.org/warcraft_ii_tides_of_darknessgqqu1.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/ansi_c_book_solutions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b9c466-b523-429a-83e6-69911fb1ef02/rulomivabilopapojadizomi.pdfIn PDF document text
    • http://vawekud.epizy.com/gopro_hero_4_silver_timelapse_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da3a5ff-6e75-42be-94fb-f96944f150fa/nozupimuwiba.pdfIn PDF document text
    • http://noworevapetero.epizy.com/finidimolimadelebom.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/aquaculture_and_fisheries_biotechnology_genetic_approaches.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/budgeting_planning_and_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3366a9ef-dfc4-4a58-a780-10590d1615d9/lutitakenifisutenom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c69275-082c-47bb-9d56-ad2266fb25ee/95300988802.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 5800 bytes
SHA-256: 418850a1a6409d6d88f04ec446be6eca3fa3bb3a9eb7d15bc1146ab848dc3a7e
font_01_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 10676 bytes
SHA-256: e69397e5a88bf619a1fd1b656dd13ecf55097a01de274b4a30bedca0081bd9dd
font_02_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61