Malicious PDF — malware analysis report

Static analysis result for SHA-256 5594853d1ef769f5…

MALICIOUS

PDF

76.0 KB Created: 2021-01-08 01:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 31ac88c0a76b73eb5fa2237ba6e23762 SHA-1: 52892ab1fa8b1b7ae094fea85c78635be1938473 SHA-256: 5594853d1ef769f53ae6a9be063164ca74b013bd12c7a50e0e1261c4c63aa380
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/wb?keyword=desiree%E2%80%99%20s%20baby%20by%20kate%20chopin PDF link annotation
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/9319428.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/sezogek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_5fd7c5dc08021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_5fd6983ad2831.pdfIn PDF document text
    • https://pebekokinusixi.weebly.com/uploads/1/3/4/5/134506994/f09715d06eb1fbf.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/5814302.pdfIn PDF document text
    • https://vamemaxodoj.weebly.com/uploads/1/3/1/4/131437173/faliz.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/xubiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff5e0666176c.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/konarufekuwajo.pdfIn PDF document text
    • https://dabamupusoga.weebly.com/uploads/1/3/4/2/134265366/1370465.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/7001702.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/87e67066-42a9-43a7-8b18-204299a819e3/buduweziteloxosikover.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/87690431169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f9bad8-3e3a-418d-b071-8fc1a53ad52a/24740706730.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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5348 bytes
SHA-256: 14dddb3f54e847599accd5155a110f814236a9a62013b4fc2a5cb3b029fd7c4a
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 10728 bytes
SHA-256: b9c5f8b75c1e1e9631500c24929154ae683bde1614d693cb1989a9684493f5e9

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