Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcab3f973ae873ea…

MALICIOUS

PDF

41.4 KB Created: 2020-11-06 20:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6271ccc3e19ab70f0f71eb518e72cf2d SHA-1: 24a9f5d742a83a76960acea7fc4be3662cb409f0 SHA-256: bcab3f973ae873ea750d9001c7d1ca27193cb90446f0e7c49ac65879449421a3
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/wb?keyword=cast%20of%20live%20movie%20little%20mermaid%202020 In PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/libemifag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f9d352f0baec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f95711bb6895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_5f98fb48469be.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/dca3d6ae-597b-4df2-b88c-684e89ce7875/74230030512.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/cuaderno_practica_por_niveles_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/words_with_meaningful_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/basketball_stat_sheet_printable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/wuwedajedezeb.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/projeto_ararib_plus_geografia_6_ano.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/rock_island_high_school_registration.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/all_in_one_guide_for_class_10_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3f5626-4cfe-4a0d-be6b-c81992a4cddf/fireproof_paint_cabinets_for_sale.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_off000061fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5292 bytes
SHA-256: c4e796caa1613dd124417a96e09bb2bf12c0d64f4588230a4152b0c3a2896dae
font_01_sfnt_off000073eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 11092 bytes
SHA-256: 46c86291919b0c04df14d0cbd87b79b67a6184b68da6a1d65ffbd8de15ef1da4