Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14c4f93b2a039a5…

MALICIOUS

PDF

61.5 KB Created: 2020-10-15 22:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0137785a196feeec6e990eabe02af8b1 SHA-1: 1280decb81e7687f91ac6343b7cd9d36bff53c58 SHA-256: d14c4f93b2a039a5e506f5d32224067f789998ab1f10dc5f6c81b45cb0fce055
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://cctraff.ru/123?keyword=scrying+stone+wow+guide In PDF document text
    • https://site-1043532.mozfiles.com/files/1043532/53120125836.pdfIn PDF document text
    • https://site-1042942.mozfiles.com/files/1042942/9372299052.pdfIn PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/dexalolos.pdfIn PDF document text
    • https://site-1040571.mozfiles.com/files/1040571/73136574842.pdfIn PDF document text
    • https://site-1039597.mozfiles.com/files/1039597/finding_angles_of_polygons_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f879a64ceb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f87095c99ec8.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/xavafuwel.pdfIn PDF document text
    • https://site-1036944.mozfiles.com/files/1036944/jifelabobokel.pdfIn PDF document text
    • https://site-1043216.mozfiles.com/files/1043216/63066318180.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/96192013446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7487/2006/files/54486788431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0758/9530/files/54724845713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/coulombs_law_equation_units.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8717/5063/files/exercises_mixed_verb_tenses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/vagajijolisiwopanemebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/18279913004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3006/8386/files/lejadewofexirodukesa.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_off0000b271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB271 5160 bytes
SHA-256: 8473bf6e9f50832612f1c5ec5e8bc0b1f09ee92c1d5068e3dbff00d31f22ae49
font_01_sfnt_off0000c41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41D 10788 bytes
SHA-256: 216df679767c7f28957a1d83caa971bd3031ce1d9a574da2b7c28d2d432af81d

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