Malicious PDF — malware analysis report

Static analysis result for SHA-256 7990861503979290…

MALICIOUS

PDF

89.3 KB Created: 2021-03-18 01:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b33ea618e3cb6f3a96a2e64e7893c951 SHA-1: a3b5099aa6c16a7b46df89e5599eb293bc6c7d8f SHA-256: 799086150397929084db633b2ce54bab99b8623f74eb4b7a787c0536a8564549
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm heuristic further supports the attack pattern of directing users to potentially harmful websites.

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://druttle.ru/award?keyword=answer+to+complaint+california+pdf PDF link annotation
    • http://tuvivukaroj.mygamesonline.org/american_woodmark_catalog.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/62d5b70fc65.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/career_survey_for_high_school_students.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/b494b4d3723.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/james_patterson_deadly_cross_synopsis.pdfIn PDF document text
    • http://bufizuz.22web.org/bogogusosakaputi.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/xepopokelugivavifubab.pdfIn PDF document text
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/nuledofowodoxox.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/db28c9.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/best_cv_template_word_for_students.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/what_does_the_color_red_say_about_your_personality.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/83119289840.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/why_is_my_tv_screen_have_lines.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/98fec.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/261a7248-6b50-4b52-a1bc-b92d3341bf0d/richard_foster_celebration_of_discipline.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/valor_mensalidade_curso_de_ingles_wizard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1f21fb-5084-421e-af00-a8437a636778/who_were_the_12_gods_of_olympus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4dc10f-2fee-40e3-bddf-715894d2858a/focusrite_scarlett_2i2_studio_3rd_gen._recording_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb8340c-a4df-40d9-9dd3-b05443082543/duo_pressure_cooker_and_air_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/fading_like_a_flower_sheet_music_piano.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/fepalopumew.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/vampire_diaries_season_8_episode_15.pdfIn PDF document text
    • http://koxowasone.epizy.com/barron_s_toeic_listening.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_off00012041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 5384 bytes
SHA-256: 60c537621d8cd5a6e4f21a809bc178e5492283051bcab6dec9daab5bab8cd925
font_01_sfnt_off0001328a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328A 10848 bytes
SHA-256: 0ff90ed44213aaa77a8ff4264e5189a6e2df27cf3fdb9d2dfa57b42c60a147c9

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