Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdbc609a9c0d3a3…

MALICIOUS

PDF

71.8 KB Created: 2021-01-28 00:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d7d4fcc91cdceeb1283a18042e68f8c3 SHA-1: 20174e161e2a488853ae1a22d1acfc5432e19498 SHA-256: 2cdbc609a9c0d3a3283c608b228d235025d1ffff1d2f95e26e62bd64f7ae55d8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/wb?keyword=vertically%20challenged%20definition In PDF document text
    • http://hookup157.fun/stihl_019t_parts_diagramrlb1g.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/best_instagram_hashtags_for_fitness_modelseuk8m.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/jjgXieV/download_real_cars_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/if7C7hi/kuravopojalel.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/g4Sgihc/27721139635.pdfIn PDF document text
    • http://shopmzm.site/65075814913rrmbd.pdfIn PDF document text
    • https://cdn.sqhk.co/gedofovel/guR4Wid/pico_de_gallo_chipotle_restaurant_recipe.pdfIn PDF document text
    • http://playmarket-online.com/best_online_and_offline_music_playerq9dj2.pdfIn PDF document text
    • https://cdn.sqhk.co/lerepetoni/ajbjbif/63434003389.pdfIn PDF document text
    • http://skout.tech/75720928837k3fr9.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/jaa0hj7/mezukubiputatiriluzitu.pdfIn PDF document text
    • http://slimitalia.space/28606602916sllls.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tasukifuputuf.epizy.com/a_boy_called_bat_guided_reading_level.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/lularowimaw.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/qualitative_test_of_carbohydrates.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_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 5172 bytes
SHA-256: 9babf37c7a9569fb2a1ab83187a0c1607f61f8e787689f9bae605b6cc9746497
font_01_sfnt_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 10820 bytes
SHA-256: e0e420919b49f9d0fb7d3856d802134c007dfd793f72e56261b68e96cbfff07f