Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b4cce60902c2b8…

MALICIOUS

PDF

41.3 KB Created: 2020-11-06 23:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: ad8a8b40d642cc10f28210eb7550a57f SHA-1: 1d1a872fb30b59f47443f6409319eb77edab5bd5 SHA-256: c1b4cce60902c2b8f4a753536148ce77bd439dff6668b10e3f273f91805bbc75
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffset.ru/123?keyword=bill+gates+yacht+tour PDF link annotation
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/zewum.pdfIn PDF document text
    • https://pasabegimukug.weebly.com/uploads/1/3/4/2/134265340/a9e868386c.pdfIn PDF document text
    • https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/falefew_lodek.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/napuzo.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/07a7169d-5fc7-44fa-928d-e29a56735afe/83817537883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c302f955-e221-45b2-897d-db604b0308d7/medical_biochemistry_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146edf8e-7965-49d1-a6cd-ebfa9fbfcfe9/61718681054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8df1acb-4c1e-4cf9-911c-0ea74eaf1b83/mezotifovikan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6493883c-e228-4dff-94cd-baba1490f014/94703176451.pdfIn PDF document text
    • https://madosoze.files.wordpress.com/2020/11/kiratolizewevebodanaxikam.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/hodder_cambridge_primary_maths_stage_3.pdfIn PDF document text
    • https://meniluw.files.wordpress.com/2020/11/72888701979.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/moxubexubuf.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_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 5212 bytes
SHA-256: f83eecd5779af9450050b1837016412e0cf84cd1f0484172876724cfda1ebc0d
font_01_sfnt_off00007451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7451 10608 bytes
SHA-256: e0f65eaab57d13980aac7cc6c95cd5e9f50951bf3c2a9c15146f9dc07778f10b

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