Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b92b69deb9336b1…

MALICIOUS

PDF

135.4 KB Created: 2021-03-10 23:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 29b03a9a003603443d2f68acf0368b7a SHA-1: 68d61ce1f0198f5a40117ebb179208a395c69569 SHA-256: 2b92b69deb9336b1dae2dfe2931bc91f6c8b9c45e5feee87b1b028fde475be15
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'vilenefex.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed to host many links, further supporting its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • 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://vilenefex.ru/wb?keyword=the%20apocryphal%20gospel%20of%20nicodemus PDF link annotation
    • http://rivepozepuxar.mywebcommunity.org/after_12th_arts_courses_list_download.pdfIn PDF document text
    • http://gakmancreatures.ru/air_ascent_infinite_realmt64ff.pdfIn PDF document text
    • http://romeoplanet.club/canon_ip90_drivers_for_mac_os_xtijv0.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/10010171731.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/29219421854.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/alfie_kohn_punished_by_rewards.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/nixon_51-30_chrono_all_gunmetal.pdfIn PDF document text
    • http://ecosbor.net/corona_for_archicadbhn3p.pdfIn PDF document text
    • http://dostafood.xyz/90327762712cviam.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/eea4fbd2-e7b5-45a7-8cd6-95685070a597/visikuvadobiduluwoje.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/kohler_dtv_valve.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/roomba_980_black_friday_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372497d9-a422-4ffa-8b5f-367d1fa2e7b7/bollinger_bands_strategy_python.pdfIn PDF document text
    • http://bedawisanono.epizy.com/gelujufalogipalekug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11278528-8069-4fdf-9469-cc715488482b/48697839103.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/amway_all_products_price_list_2020.pdfIn PDF document text
    • http://kagapari.rf.gd/informative_report_of_demat_account_research_methodology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ee9636-cfb6-4985-934f-954a8ef16d2b/how_do_you_start_an_aa_meeting.pdfIn PDF document text
    • http://kisixowiloru.rf.gd/scag_tiger_cat_2_deck_belt_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e7e41b-e4b4-4202-bf60-a40abfb8c890/lonexakiviwobi.pdfIn PDF document text
    • http://mutifesojare.epizy.com/chambers_of_xeric_guide_solo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f0db05-7ec0-4984-8ce6-95a4e83e59cc/52965638195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdbff6f6-b3c8-4fac-b91c-f520e03392d4/nikibokukozapub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b3d1c1-8c42-42f4-b06f-cda5971e2de7/carreras_universidad_del_valle_cali.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8BC 5620 bytes
SHA-256: 4921068744eb8f7a63bb79a82fa12e2faf1fe237738fe41725faaa80b0eb64b3
font_01_sfnt_off0001ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBB7 10516 bytes
SHA-256: 496d03428ca34ba2ec4890a0f55bef52b4fb4d583b499ef2cfe524bf99fbd5d8

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