Malicious PDF — malware analysis report

Static analysis result for SHA-256 0100ffc659f8daf7…

MALICIOUS

PDF

43.6 KB Created: 2020-10-11 22:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1c9ffc26642d3b1adc11af065cd127a1 SHA-1: a4045e28736af802020e8889e99213d13afc8a73 SHA-256: 0100ffc659f8daf7348c7351d413270afe05721d9ae6c36b9e82b1cc8179376f
194 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.
  • 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.
  • 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://ggtraff.ru/pify?keyword=enochs+high+school+phone+number In PDF document text
    • http://files.doralcardiology.net/uploads/1/3/1/4/131453329/xikonozopefakako.pdfIn PDF document text
    • http://jikude.biesebroek.eu/uploads/1/3/1/8/131856072/fozibegidubewojenov.pdfIn PDF document text
    • http://files.provideacare.net/uploads/1/3/2/8/132815882/vawebazusojoni_teguxotudowexo_warenorujole.pdfIn PDF document text
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdfIn PDF document text
    • http://sefonal.skippingnt.com.au/uploads/1/3/1/1/131163914/fokipodebazexo_panofevofutob.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/2711477726.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/99702018379.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/21042500770.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://uploads.strikinglycdn.com/files/089427a3-e45e-4b99-9e2d-f49a0f1d42d4/93751018518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b11324-9e16-408f-8d15-80c8801ee805/defojewebuluxonikufixuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c33f37-749b-4cc7-a3ae-a264cf0c79c0/bewipowamoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1628/8918/files/dyson_cordless_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/dog_eye_patch_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/88710404148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/sijanizedojodulizosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/2190088241.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_off00005d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 5036 bytes
SHA-256: 242f50d0947fb9dd956f7592eafa13973e9059fa2aef2e02c4a2fb759bfccc96
font_01_sfnt_off00006e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2B 10912 bytes
SHA-256: 2e3a64c613b792913c24324f9d7d7582cc6289a585c53a314f9e9b2950ff9442
font_02_sfnt_off00009348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9348 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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