Malicious PDF — malware analysis report

Static analysis result for SHA-256 def534e1503d7318…

MALICIOUS

PDF

71.2 KB Created: 2021-02-21 06:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d4690a1981b2e8347e0f1ae920f71824 SHA-1: 913edaf5b4d45c7d84615016ccfb7b1e5826b6b1 SHA-256: def534e1503d731857156772577bd13f8dd6d042fa9e1fd4c2bdfda4a408da43
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=fender+starcaster+strat+black In PDF document text
    • https://cdn.sqhk.co/kosenopelid/aNuietm/pocket_rocket_2_stroke_oil.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/BTHtijM/bemokukideg.pdfIn PDF document text
    • http://reawont.online/bolt_and_nut_torque_chart2hj5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5ffeb729f3816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_5fda6c9fcd62d.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/Cjgiahe/39082600598.pdfIn PDF document text
    • http://skidki-day.shop/financial_accounting_10th_edition_robert_libby4z8rb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixije/gthgABU/learn_kung_fu_app.pdfIn PDF document text
    • http://scrlt.xyz/jezojemek9a7.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/haghih5/run_fast_run_new_game_temple.pdfIn PDF document text
    • http://1gusevshop.space/fadadafulexajebexofods511.pdfIn PDF document text
    • http://medicinfo.online/turubupotilugezimewougooc.pdfIn PDF document text
    • http://akvatehnika74.ru/idle_wizard_alchemist_guide1x4la.pdfIn PDF document text
    • http://dmgameplan.com/translation_et_rotation_4me_exercices_corrigsecgby.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/dphgRNg/gupolitolodov.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/9hbnha6/zekunoviwomugazononezid.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/agdyhcz/fight_nights_upcoming_boxing_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/Ff2mqjf/baby_nursery_decorating_furniture_ideas_white.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 5092 bytes
SHA-256: 60f427b108177afb36bb1e1d743a56b0109a5a8fd630e6d55d1f364a154a1212
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 10548 bytes
SHA-256: 85dcfba10c7ee1e89e55c6ced79e9430009b6e88e1df5bd41e84b0c2d38004c8

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