Malicious PDF — malware analysis report

Static analysis result for SHA-256 21241c1296d736fe…

MALICIOUS

PDF

55.5 KB Created: 2020-10-25 10:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b053d567f0b3b596fc6701d4912710cb SHA-1: 493bf1b1812a0b280b7af0a4744cc27ab823de51 SHA-256: 21241c1296d736fe76d1ef654e00b5d3ab58f0d612ab0d0f1d514534ba2586c3
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://ttraff.link/pify?keyword=beatus+ille+antonio+mu%25C3%25B1oz+molina+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f8cb44221b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5f9524a1bdff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f93aaa65e6d7.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8701653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_5f92b1c906ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5f924e82877d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8a906ba79e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8ceab0153b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8a88ffe48b5.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/xurigenoj.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/4348654.pdfIn PDF document text
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/welivini_wirufiluduvoloj_bekonev.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000096ee.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000096ee.bin)
    • https://cdn.shopify.com/s/files/1/0266/9756/4357/files/12389541876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/and_but_or_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1395/5496/files/eysenck_dimensions_of_personality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b08581c-5abd-4f86-9bda-a23588242543/veroziwudesaxowuvufedex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b88a3d0-8dac-49da-9256-e50f25bd9cf0/xezexukatagikuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5415bb0-bbb1-4db1-9d28-9f0e0a5cce0a/funowaxorireze.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 extracted file (font_00_sfnt_off000096ee.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 5400 bytes
SHA-256: 30424523fd2aa38fb7b038b6c3684339abd3d8c4bcc92723d9202fc8968115fc
font_01_sfnt_off0000a907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA907 11552 bytes
SHA-256: 9566e37baa0917606bd132c8d4b7fdd7048ab620d9c9e0bf2ca114c01ea8c1f9