Malicious PDF — malware analysis report

Static analysis result for SHA-256 5732785418d04b65…

MALICIOUS

PDF

45.9 KB Created: 2020-11-04 14:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 3fc4c07fcc3da0fcc8a0bd692bf63632 SHA-1: 35cf38c46cfc7e62f0dce0354d7bfba56cad63f5 SHA-256: 5732785418d04b65a909db5df7b7f50fd4bcad256325c730cb5698873f99af52
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/strik?keyword=technology+in+action+14th+edition+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f987c6958216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f8dc76dbaa16.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/kekunubowutazax_jovaxoteruvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/contoh_soal_aritmatika_sosial_kelas_7_kurikulum_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83647b0f-6996-4709-b955-b24d9029329f/legend_of_the_guardians_the_owls_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5071591-2225-444d-8dd2-6a617f39457a/warren_wiersbe_bible_commentary_ot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb88da5b-1c47-46b8-b536-02b8c7d8b7ba/16908584474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2357bcb7-6472-48b4-a7ac-b00a29a9865d/40338948310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4940e9-4007-48d7-87fa-51a2fa582318/spectrum_channel_13_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316440b2-3391-4385-a7d2-bc42256cf1bf/neluloxodilasobop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e202f980-245e-400d-8703-28fe3d4fcdf2/rimojidixepaniwadom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07139ce6-ccb2-4575-a17d-a5bb572a45ec/foxeletig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d940861-ad1c-4f58-9d7b-3e8a1bdba28c/90290002742.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_off000071e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E3 5432 bytes
SHA-256: c1db7c849e7907b548b13e033d95987bfe36d222e10ae7c1284b3e2a7ff81500
font_01_sfnt_off0000846a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846A 11316 bytes
SHA-256: 46cbbccf7e086773a8dec58b9a3129fb4ad3550e574c6b8147715b83116251f1

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