Malicious PDF — malware analysis report

Static analysis result for SHA-256 487a9d271b650413…

MALICIOUS

PDF

45.8 KB Created: 2020-11-07 23:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 41b7ecbbf6bedd63da200130364f6924 SHA-1: 79eb858fb573368d4a78c94ada8c7c49fc5cdb7f SHA-256: 487a9d271b6504135cc366e798f88e2ad920b196426e0db6df8bfe511d854ea0
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://traffking.ru/123?keyword=marantz+mm7025+review+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8ba06b23ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5fa3cedfadc67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_5fa6a80416475.pdfIn PDF document text
    • https://radopubida.weebly.com/uploads/1/3/4/6/134608457/d63f94.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/637e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f9efd1636de8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_5fa3dcd16c835.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/kidekiga_kenumesilesegom_xatuvarovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_5fa517b4ddf48.pdfIn PDF document text
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/cbfa95b2b.pdfIn PDF document text
    • https://samoxaposem.weebly.com/uploads/1/3/4/3/134361226/05c43186467a.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/6052223d-7555-4811-8039-ac0a862ed260/felunonisi.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pulimufexisimewajoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bbd558-e905-45ad-bb31-fa3bc521138a/ginuxolexiwuwebiga.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_off00006e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0B 5552 bytes
SHA-256: 206ac23d66283044f472258c9866118962f4f64bb5c2792671ec49dc57480377
font_01_sfnt_off00008108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 11992 bytes
SHA-256: 1bf29e4af16fcd08fd188ee436c70826919af847c64cd21a03f766bd8894c1d7