Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7b17b9c8595c65…

MALICIOUS

PDF

66.4 KB Created: 2021-02-02 00:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b3f25e3bf76c2548f40ebbb129e88bf6 SHA-1: 633dec0a1074b8d464b6d8d939798fa232e4b3cb SHA-256: 4b7b17b9c8595c6572de79b743d0de672642834fe9208546c3f0536291694dc7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/shook?utm_term=baby+care+play+mat+bed+bath+beyond In PDF document text
    • https://cdn.sqhk.co/madumubo/5OifEji/file_manager_hd_download_uptodown.pdfIn PDF document text
    • http://xenemedoxasuv.22web.org/fewulizofanatodipow.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/aNifhbz/10200811726.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/6jiLWie/kewikaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/miix9at/metal_radiosender_deutschland.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/unable_to_format_sd_card_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ijcKNjd/all_basketball_games_yesterday.pdfIn PDF document text
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/rerarot-pujokixafad-lidunapo-wesekapakeju.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/wurivuve/jvc_orientation_questions_and_answers.pdfIn PDF document text
    • http://gigivixegaxun.epizy.com/yooka_laylee_impossible_lair_achievement_guide.pdfIn PDF document text
    • http://rilefup.epizy.com/nebudevaga.pdfIn PDF document text
    • http://jawikiluzejibe.epizy.com/apocalypse_child_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/74637468172.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/slope_intercept_form_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/pitifofex.pdfIn PDF document text
    • http://nokakegobowu.epizy.com/whatsapp_iphone_free.pdfIn PDF document text
    • http://gosigugul.epizy.com/aditya_birla_capital_annual_report_2016-_17.pdfIn PDF document text
    • http://jovadoku.epizy.com/disable_bixby_note_9_android_pie.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_off0000c60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60C 5428 bytes
SHA-256: f08d360145883023f6368e68ab2d47602bbbfab25dfba6413bee52d02bbba86f
font_01_sfnt_off0000d854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD854 10700 bytes
SHA-256: 0c819c199184f3367b4dee348a98f81798bbb55963faee3e228dc72b47ce27c0