Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e545354eaff1135…

MALICIOUS

PDF

44.9 KB Created: 2020-11-09 12:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 2ab02dce418fe2acf827cbcd068f7686 SHA-1: 57a072d25e9afceb7ac2f8240ca4fd4cda900bd6 SHA-256: 6e545354eaff11350ad49fee79ecaa3e3d463427f937e5efd1bf5d0ccca1c8e0
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=word+with+the+root+anti PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5fa7c0ba6d071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5f98901670562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5fa3c84315331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f909780bb65c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zalomi/steel_gauge_thickness_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/90760629103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bdff9e-1aa3-47b1-83d4-ab2632de2900/79372052361.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/introduction_centrifugation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74000827-36f7-45a2-8171-cdd66c5382ac/meu_nome_nC3A3o_C3A9_johnny_filme_completo_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6363fb9b-b9c7-4860-a43d-13e25028b711/rewajadovifebozeruxime.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_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 4808 bytes
SHA-256: 8bd5a64241696b9a49fe007128a48d4ab6821db60e556fcf4d7677ceccda7c19
font_01_sfnt_off00008054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 11636 bytes
SHA-256: 4a6dc6f999ab0ce9da76f42704b7203f656e391bbf54b7ab3dc0b2c0d786074d

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