Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c56b961b0ea6fc…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 22:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b5248b937a1037ba8933c2bd51793787 SHA-1: 23418852dcf6ddfec30cb5bbcf2ac99500014c42 SHA-256: e7c56b961b0ea6fc4d69dbaf44747fc56d88352a6bd66806d5683e92e653b469
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' in one of the URLs further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=what+is+the+vrio+framework PDF link annotation
    • http://vesibigezedenu.iblogger.org/jeevansathi_status_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/HEihzhh/best_mauler_heroes_afk_arena_2020.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/english_sentence_translate_in_marathi_app.pdfIn PDF document text
    • http://wei-nmvc.com/states_of_matter_worksheet_grade_7_with_answers2g26u.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • http://xidolamel.iblogger.org/bengali_magazine_file_free_download.pdfIn PDF document text
    • http://petojasunegoda.iblogger.org/widitoxurepe.pdfIn PDF document text
    • http://austritkfa.com/jabufcrjqp.pdfIn PDF document text
    • http://biweekamnf.com/midnight_in_the_garden_of_good_and_evil_chapter_7_summary1fk53.pdfIn PDF document text
    • http://dostafood.xyz/bkash_apk_2._4._7l75vr.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/PHyeibS/57096821768.pdfIn PDF document text
    • http://idealsit.fun/what_is_a_dynamic_factor_analysisjvvjo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefojebenodimu.rf.gd/20529381610.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/48265717579.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/characteristics_of_a_transformational_leader.pdfIn PDF document text
    • http://rawarawoxegig.epizy.com/22870401510.pdfIn PDF document text
    • http://lozefedewi.rf.gd/spotify_premium_hack_android_2019.pdfIn PDF document text
    • http://kikumofesokir.rf.gd/habit_tracker_template_word.pdfIn PDF document text
    • http://firuneta.rf.gd/bishop_barron_the_mass_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/2561443931.pdfIn PDF document text
    • http://gefuxexo.epizy.com/temeregibo.pdfIn PDF document text
    • http://zelusovudexa.rf.gd/calling_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/pumebopivakiturudov.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/is_2008_honda_odyssey_a_good_car.pdfIn PDF document text
    • http://rafodize.rf.gd/mehndi_designs_for_fingers.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_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5204 bytes
SHA-256: 95c449f363e2ae7dc575ea1438e0b9638f26866b2174f1d4c57d6688616918a4
font_01_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 11188 bytes
SHA-256: 68fd27fd58b7b1a92ba80bd6e6565f69a9873588e1ae2e45768660a9e6a56485

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