Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edc3fcf55131a21…

MALICIOUS

PDF

65.6 KB Created: 2021-02-26 18:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 42dfaba9dde5cbeef119ab4377f9f782 SHA-1: 64af8a39648f1138a6a3f458d6cf1396beb22d4d SHA-256: 3edc3fcf55131a212510016bd608b12b9dea17cc2d600e6e8aae09b63eab3fdb
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://crophysi.ru/award?keyword=intex+ultra+frame+pool In PDF document text
    • http://tumbochka.space/urban_ninja_warrior_lexington_kye65kr.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/xRiaher/cool_fonts_keyboard_for_instagram_stories.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/9LjedWp/wejexab.pdfIn PDF document text
    • http://fragcups.com/nc_dmv_permit_study_guidel8idg.pdfIn PDF document text
    • http://salopkisa.website/body_parts_worksheetzdxti.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/gg6gggi/21068463714.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/ehQ3hfz/55579914945.pdfIn PDF document text
    • http://reflectionss.space/how_to_stop_a_top_load_washer_from_smelling32li0.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/iI6ifaQ/grand_theft_auto_64.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/456819.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/haji4R9/pocket_league_story_mod_apk_revdl.pdfIn PDF document text
    • http://itanah.space/game_of_thrones_3._sezon_10._blm_trke_dublaj_izle0p0ht.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/7860045.pdfIn PDF document text
    • https://tojalebume.weebly.com/uploads/1/3/4/6/134603773/jumawawiwi.pdfIn PDF document text
    • http://sayfelengs.space/lukeledowidanapozisud2p68.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/hcdu556/magic_dream_tiles_mod.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_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 4872 bytes
SHA-256: 8dc23bb5bfab2572c5b6e79c797bc2e7fbb4c275a07ae5b24974d2c78857d83a
font_01_sfnt_off0000d8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B4 9824 bytes
SHA-256: a733d85d9250eaea9835cd9a148c6cfd59d0774ff89dd3c7e2fc59cc5817b2cb

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