Malicious PDF — malware analysis report

Static analysis result for SHA-256 191c30e1d2902606…

MALICIOUS

PDF

46.9 KB Created: 2020-10-26 13:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 5aad8e5af06a6377e4599d4ddc0cce69 SHA-1: 9a56d6b6be4b23976459f45b51b33aa5272f83c7 SHA-256: 191c30e1d2902606871a2f12a2c28c3c24d0db0c9814bbe8d0f0d9ef9d07fe0b
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=practice%20spelling%20worksheets%20kindergarten In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/tedukixi.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/tokatid_zexanoni_lidoxodegig.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/1625515.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/megomodewava-pusatigejigedus-rosifexixu.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/mafujoludexo.pdfIn PDF document text
    • https://gepinizidewepi.weebly.com/uploads/1/3/4/3/134305752/dolujufus.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/eab91baa-6b5a-4719-a9f8-5d858216f8a0/kpss_evveliyat_tarih_konu_anlatm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d74bee-06bf-4a42-b159-58e983e339ff/rojititufikiwitamolarijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e9d8f1-3953-4cb0-9375-5c240753a8b3/49234004280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e482f20-8370-42bb-b758-6ae62327daa8/muxipexukugijinanufur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af9a5be-0fa9-4e0f-88dd-8e3e6f45f7e9/3350017946.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/belajar_bahasa_korea_untuk_pemula.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/logical_fallacies_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6280/8742/files/13953981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2360/5153/files/rixodemozirinojadozobulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4685/7635/files/biology_grade_10-12_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/wetizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8334/3027/files/87930350371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6954/6911/files/derecho_mercantil_ignacio_quevedo_coronado_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/how_many_types_of_church_government.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/moduxaj.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_off00007620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 5492 bytes
SHA-256: dcb81e4957593204a7deb654c0be0a71872fa5016f519646e16f186897da8b92
font_01_sfnt_off000088c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 10796 bytes
SHA-256: 42adf39d534105ec7011dd5f303bd3f10e5fdb2afbbef8c2f60e8a8c9bc78163

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