Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb0bb1257f17353…

MALICIOUS

PDF

67.5 KB Created: 2021-03-03 18:24:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 69a8cace509f9b92bab28ebda139b08f SHA-1: 111ae7f372aa0c490e36a988f44cb7ed25c39aba SHA-256: aeb0bb1257f1735343b8585e8626815d13aa23cbb5aadf6f56f36c72ffa9d639
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://dafemum.ru/award?keyword=daniel+kahneman+pensar+r%25C3%25A1pido+pensar+despacio+amazon In PDF document text
    • https://static.s123-cdn-static.com/uploads/4464871/normal_5ff678ae805c2.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/haBhb9K/poxasi.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/WjeDHsq/kunisawox.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/Sge3JSy/among_us_free_pc_all_skins.pdfIn PDF document text
    • http://leaninrzpd.site/kerbal_space_program_xbox_one_guidet27nd.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/aAgew7c/7962931480.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5ffa7253be556.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/jghhcjd/download_war_conqueror_3_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_601100573ec32.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/Pigijjf/zaninenetufamunanepoko.pdfIn PDF document text
    • http://disclosures.space/wixavowuw3jyoh.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/xOGheSh/microsoft_planner_vs_project_vs_to_do.pdfIn PDF document text
    • http://organic100.fun/nakazeco49q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416787/normal_5ff697cbc9ac2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5fdd78cd4be8b.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/26374692238.pdfIn PDF document text
    • https://cdn.sqhk.co/gefewivurov/r2higgS/dragon_hunters_movie_watch_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorijefugixor.atwebpages.com/kekojedatelew.pdfIn PDF document text
    • http://buxebawimiro.epizy.com/arabic_songs_ringtone_2018.pdfIn PDF document text
    • http://rafesule.rf.gd/a_seasonal_pattern_in_time_series_data_is_evident_when_the_level_of_the_variable.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_off0000c81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81D 5660 bytes
SHA-256: 5ee1abdf152c8e8345d9fc8ed23ea2e7da237739584e1ef6295831d391342247
font_01_sfnt_off0000daad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 10724 bytes
SHA-256: 3ba1ebbbd4eaebaf10e37511f9cf48be60c821eb960a1c0f5fda7e03f2512892

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