Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2f8a8dc0a48654…

MALICIOUS

PDF

80.8 KB Created: 2021-03-11 06:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 12e2adee94b2a177b3b2bcc6bb54a9ac SHA-1: 3fb134cbd5e704b1e9f9f09857d0fb6622688f37 SHA-256: 0c2f8a8dc0a48654e53e6eeda3463cdb3c18e11d9f154664d84326fb6f06476e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://kuzutuzo.ru/award?keyword=american+english+file+2nd+edition+pdf+download PDF link annotation
    • http://towufato.mywebcommunity.org/29524519346.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/fexizakadibi_pobagopato_zagevafanofo.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/how_to_measure_effectiveness_of_marketing_campaign.pdfIn PDF document text
    • https://bekiwoxutoga.weebly.com/uploads/1/3/2/7/132712348/b4b843f998.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/egginHh/pepper_com_black_friday_deals.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/software_tester_salary_in_usa.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/woxuduriraga.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/marlin_model_60_22lr_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/68hjIoO/red_and_blue_game_2_player.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/68661833655.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/ggjdrhd/chicken_invaders_2_free_download_software.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/jfJeOia/xofijedajutimafef.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/stealth_cam_g42ng_trail_camera_reviews.pdfIn PDF document text
    • http://kafologegodudo.iblogger.org/63523859557.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/minolta_srt_102_review.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/attack_on_titan_season_4_episode_2_release_date_netflix.pdfIn PDF document text
    • http://novoniranalisa.epizy.com/powermate_generator_3250.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/quality_assurance_definition.pdfIn PDF document text
    • http://jedejuleler.epizy.com/15286595989.pdfIn PDF document text
    • http://datufubizut.rf.gd/arcadia_quest_beyond_the_grave_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/business_information_security_officer_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/general_comments_for_reports_year_4.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/backseat_pilot.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/cursive_alphabet_worksheet.pdfIn PDF document text
    • http://wadusobu.rf.gd/how_to_know_your_zodiac_sign_by_date_of_birth.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 1660 bytes
SHA-256: fc3e3ba05b71685058a5fe0dac996ad5caa6965d08312dda8c55599f2c165b71
font_01_sfnt_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 5780 bytes
SHA-256: 5b033b48686dbbd8ebafb537ad2f4a394e6898853583717fbe38bff5416d063b
font_02_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 10212 bytes
SHA-256: d7d89f197d91825ddf0fa28fd943993dd1429152f2c0b5f03c2d1b5dd7a76d0b
font_03_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 16164 bytes
SHA-256: 033de1c4e825bb1bee9119c973e9fd4b9b5b9412870fb9751d0cf87e02490b1e