Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d581a78f3237a0…

MALICIOUS

PDF

41.5 KB Created: 2020-10-19 07:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c8d86c6383a10f9005dd9def6a627d4b SHA-1: e666e0fbe2d86a847e38ddec9382dcb9c1be0ea1 SHA-256: 75d581a78f3237a059fbeb9ce811694d7bd94eda03a62f1823f6ced9328d0c38
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=game+of+thrones+3.+sezon+1.+b%25C3%25B6l%25C3%25BCm+altyaz%25C4%25B1l%25C4%25B1+izle In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/xulenijeg.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/nijijosawuwuz-nenopule-rozafi.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/tewezidisukativemove.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/mapolipimulu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/348371.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b813ea9f-bff6-4310-bea3-323427d8d2f8/mikilitip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5818d3c1-f6b8-40e8-8c66-5a9751cc821b/mitsubishi_galant_1998_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c37415d-ec57-480f-bb59-b96280ff57ea/duxilowanekeketebozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538e3160-7e53-4fd9-b920-5f9388c79a1f/poxazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39023c9-c7b7-44cd-a320-12ff629b3771/fanugesexoxebemikitededo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/kovabafaviratiwiwalobatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/yeti_in_my_spaghetti_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedfb2aa-44a6-4197-923e-e0cf5f83adfd/vewejebipokoxage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f666bf35-0332-419c-b51f-c83eb2114d80/munevuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fdf0bb-b5d9-44d3-ab5c-1ffd0e61e6a9/12056292045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d845f24-7474-43e0-afa1-0ed6589784e6/81829107514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d7c810-9faf-4335-b6d5-8790c94cad1a/69416633389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5301/3928/files/zebesifaduliseje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7233/1175/files/naboxizerizasij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3464/1052/files/xotivinara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/solving_quadratics_using_square_roots_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/jubun.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_off00005d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 5868 bytes
SHA-256: 5c81747fb888f135daf16daa2ac2082ba57f84ae6b87076b39ebaa540c8a591d
font_01_sfnt_off0000708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 11720 bytes
SHA-256: 00e2203ca0f1a2c566f5b44bc47b2b90314c35953902df1867a60bca045de0d3