Malicious PDF — malware analysis report

Static analysis result for SHA-256 271c9cd768d2a503…

MALICIOUS

PDF

78.4 KB Created: 2021-05-09 01:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 97a9940e70dfdbeff6b3bfd862c80dee SHA-1: 2df0b89640aa12b869b262d2de0dcef698b51d8b SHA-256: 271c9cd768d2a5032f651b461ae1b459205cdaafe6528924d3b3cc02f55dcce9
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, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain 'seumenha.ru' that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to a watch manual, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=citizen+eco+drive+watch+manual+h610 PDF link annotation
    • https://cdn.sqhk.co/feguzuvubut/jVnlGSg/74973568398.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/X7QnjaK/69506177114.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/hGzZwU0/72510378713.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/bulking_gym_program.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/winnie_the_pooh_story_collection.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/calendario_laboral_2020_andalucia.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/definitions_of_sociology_of_education.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/space_odyssey_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/supekokabe/63jhsij/black_racerback_sundress.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/71535659301.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/0a25aa49-72f8-40af-960f-d57070c4fbef/nejisuzame.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/jasolidedi.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/autonics_stepper_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885c174a-947c-44d9-b46d-6063724f48e8/which_of_the_following_is_a_benefit_of_using_a_budget_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/manual_de_organizacion_y_funciones_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf36cba-77b2-41bd-bb4c-0764f69020a1/siwagonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5aacb67-8c7d-4271-b714-af3063b0bee9/nyu_occupational_health_services_one_park_avenue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ec9436-74a8-463b-ac99-340d74b51c89/subarutulor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0638b2-a5b7-4738-9abe-ce152c87429b/funny_family_feud_fast_money_questions_and_answers_with_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8e749d-68cb-45a3-bca3-9dcb6230a9a6/kunubedogejapaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a526ac42-5122-4c8c-a23b-16eecf2f8885/pokmon_ultra_sun_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d478aca-05e7-46c7-bf25-18769d5f1d70/zadatozupexufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51769b93-18d9-4be9-ac1c-cc3c97c980ad/how_to_start_forex_trading_from_home.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_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 5456 bytes
SHA-256: fa4e05f4f6c39ef2305f475d6880d7f85a0ae3e63bf00bc689c67bd304f4432a
font_01_sfnt_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 14032 bytes
SHA-256: 85ae0b20d3ecb91eb53dbf70aa11de42e3fdbd827cdd9bbf20cf11bd31629ce1