Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9c30578da5b62…

MALICIOUS

PDF

68.5 KB Created: 2020-10-15 20:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fb091fd2750fd53ea5ce2377607461e8 SHA-1: e620fda1786426d1597289e9ba6a40eaa436f27d SHA-256: 19c9c30578da5b62a4d9cfef8a554259c8a910b6d269cc288aa5fab290bf4e7e
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/123?keyword=vascular+ultrasound+books+pdf In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/paxeji.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/96d8f600f4.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/woranogobuduruvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87a6de50278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f879b3062db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f881dbcd0e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8857c69eebb.pdfIn PDF document text
    • https://site-1037903.mozfiles.com/files/1037903/sowavekixopazofas.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/67843695269.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://cdn.shopify.com/s/files/1/0430/7812/3680/files/98092277567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8385/2695/files/glacier_bay_kitchen_faucet_cartridge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5725/3018/files/permanent_address_vs_current_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4660/1372/files/pokemon_town_map_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2960/1175/files/solid_edge_2d_drafting_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0261/1877/files/78970783556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5229/3032/files/nefitodoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/tuwuzisimuwuvawoxilepad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/kigisubazefeloj.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_off0000c207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC207 5032 bytes
SHA-256: 54f914a48ca195cae3a1a99af089eb137c62315f75367b82bec12182c00ad0bb
font_01_sfnt_off0000d322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD322 10352 bytes
SHA-256: 3ab54ec87b0e120fd4d33947e1a394637615be074e8d7421bd06cb749ecb3de1
font_02_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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