Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc82a718f130350…

MALICIOUS

PDF

75.9 KB Created: 2021-03-25 12:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 18e1073e583ec09169e7e3b2451a0190 SHA-1: b2fdee496c2d1e18a711e602b31651a5a3e917ca SHA-256: 2bc82a718f13035046516af46b15b391a562a3215b3a1b2c627749057f88c580
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains multiple embedded URLs, with a primary suspicious URL pointing to 'botokaw.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm on disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/award?keyword=kalender+2020+19+pdf PDF link annotation
    • http://azules.ru/2185873671168api.pdfIn PDF document text
    • http://tk-pobeda.site/what_is_the_primary_focus_of_managerial_accountingfqkpz.pdfIn PDF document text
    • http://itgermany.net/35002696629kf69y.pdfIn PDF document text
    • http://nanolenka.xyz/xobupufidukody6xmm.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/sql_server_stored_procedure_tutorial_for_beginners.pdfIn PDF document text
    • http://i12tws.website/gujopuxogonevorinegowajon9a5tc.pdfIn PDF document text
    • http://paxabak.mypressonline.com/3321154993.pdfIn PDF document text
    • http://tamakar.xyz/american_racing_wheels_and_tires_packages50ebc.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/maxajiruzemuzofigusaboxiv.pdfIn PDF document text
    • http://instapriz365.online/intergovernmental_panel_on_climate_change_report_2018hlsdp.pdfIn PDF document text
    • http://shtampshop.ru/the_innovators_dilemma_epub4cvyc.pdfIn PDF document text
    • http://ttop-shop.com/rice_tungro_bacilliform_virus_adalah9dlck.pdfIn PDF document text
    • http://arthromedro.xyz/jarogoxaduritirezenakibimtan19.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/warapagefasovi/rixebepotexipiwarijaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123979bf-e7e1-455d-9e72-917b28ec62fb/86635030588.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/genie_gict390_remote_programming.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_2af0354d9c624cd09d5d86528fb50d9d.pdf?index=trueIn PDF document text
    • http://pudolajuji.atwebpages.com/toshiba_voicemail_factory_reset.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/sifibufibudikopat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365d2f54-c5c9-44be-a308-882794f0a923/principles_of_foundation_engineering_7th_edition_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/academic_poster_template_a3_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f455c0-a4c3-450a-bdfd-454004a407ea/52982889470.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_a58d16d2eff1465cb729a9ab17326208.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d436d6f-76a7-4ab4-b6a6-f92d3758a9e7/how_do_i_translate_a_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfec8255-0d9c-47c1-978b-0bfcc633cfff/jejumoribo.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/operational_amplifiers_applications.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_061e43b6838449aa910cd27632cfd04f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/76083254489.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_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 5308 bytes
SHA-256: 7aa31990e71ad873cc45d0e8c81ece06fc2c9a99c255afcd5e04b58738e2f371
font_01_sfnt_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 12152 bytes
SHA-256: 1dacee922e2471be2c339c4632a487625ee84d4082ea12721f581a202abaf7a6