Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3d32342826bfe4…

MALICIOUS

PDF

45.2 KB Created: 2020-11-06 10:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e1c6360bccd7ed70869dfe9eb8a714cd SHA-1: e1b104fa97a470449496a02156ef04e9e0691ed1 SHA-256: fe3d32342826bfe4c9df456bd78638801c2ffd1614a3a1102cc69b3cef9c36a7
136 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.
  • 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://trafffe.ru/123?keyword=the+new+coffeehouse+investor+pdf PDF link annotation
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/8105690.pdfIn PDF document text
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/jabakifogepoziv.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/38f853ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ranaliridowegu.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/chi_cast_member_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/71318854666.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/como_aprendemos_a_leer_wolf.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/analogias_ejemplos_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1414/3131/files/rasupajajajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/niwajar.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/wezotisikugapawisi.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/57499209954.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/zovutuluvix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 4984 bytes
SHA-256: ae21b070075ddd93f3a438dad08e77a6c9e69512d151c603a92a90a4ded771ed
font_01_sfnt_off0000752c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752C 10892 bytes
SHA-256: a6ff814bc0edfc7effa2a75eaef37a53fc9f6ec0692179ba58569c1a5fd96f10
font_02_sfnt_off00009a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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