Malicious PDF — malware analysis report

Static analysis result for SHA-256 04acfbab1f1c055b…

MALICIOUS

PDF

49.9 KB Created: 2020-10-19 12:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7858deef7fd0f3c268ceea3210d616ff SHA-1: efd5cadb117597a35e9b63ebf947edb398283902 SHA-256: 04acfbab1f1c055b6be9846df41cb74cd48d3d7280978500133c170d759cd131
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=manual+de+ortograf%25C3%25ADa+y+redacci%25C3%25B3n+con+una+gu%25C3%25ADa+pr%25C3%25A1ctica+de+autoaprendizaje+y+consulta+pdf In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/bffe920c.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/gezetavitas-sodakorazasa.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/jemosi_pafuruxofuta_gumowadolomiweb_wisepera.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/0ab5b650.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/4472734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8bd59624b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8b22b6b43a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f87732d704ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8ce673622f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8bec52a2f91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/android_drawable_xml_bitmap_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/6414701402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1673/0277/files/canon_pixma_ts3100_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9870/4546/files/matthew_mathern_redfield_sd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4518/1342/files/ornamental_plant_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9195/6390/files/partes_del_cuerpo_en_ingles_y_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768302cf-d025-4bc0-91bf-224e7916bbd9/zitokosileluxomala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b3c2c7-629b-4b76-b602-b6327d7023c0/renivesodawiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8103a7-f454-4643-ae8c-3c3005a53d57/41063845044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fbcbe7-a8f2-4c7a-ac5a-29167efd7094/glory_of_generals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687d7fb1-a6de-4e71-84c0-a09431d9a42d/kodi_16.1_jarvis_builds_2019.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_off00007c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9A 5980 bytes
SHA-256: 21e480a89a3608d15d2f469c4278d99009be4983f524032fe65933027c66fc91
font_01_sfnt_off0000903f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903F 11612 bytes
SHA-256: f2ec701f3e36743946a81ef46529cc5cb2731330b5f285754ec64689ed605cdc

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