Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c4aba8da3d484e…

MALICIOUS

PDF

39.7 KB Created: 2020-10-15 21:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48679dd91db044ea561012ee32399965 SHA-1: 685a95f0061a9c0535231ea96057e65d8d01c00d SHA-256: e1c4aba8da3d484e12f4a211e955b8bda3a215528cc0ac42ad2dd3ba2faff7a9
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://ggtraff.ru/123?keyword=samsung+wireless+fast+charger+stand+instructions In PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/8783645.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/xenujev.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/nugaratidabeduviz.pdfIn PDF document text
    • https://site-1048178.mozfiles.com/files/1048178/76058931449.pdfIn PDF document text
    • https://site-1043519.mozfiles.com/files/1043519/11917936896.pdfIn PDF document text
    • https://site-1043532.mozfiles.com/files/1043532/75528689419.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/29885072538.pdfIn PDF document text
    • https://site-1048176.mozfiles.com/files/1048176/57897883215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87506b35157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f88522e79c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f875ad249435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8736d87f6fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8817adeae1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f86fc3212911.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/1/0499/9666/0886/files/7027722456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/52848552931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb28b00-f9ee-4cb3-bf5f-41afd49fa79d/lasojituguve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e65e9fc-f807-4f3f-8dc1-bc76716ae392/zivofomo.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_off00005ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA7 5628 bytes
SHA-256: 7df289c009124cd8fae9cc45b0808d2dbe4ea875d03461895caf21611ba22255
font_01_sfnt_off00006e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10252 bytes
SHA-256: 6fdf6700cca90697c3a42010724236185425128386b162b3b57c97bc3c617b9a

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