Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4650c8d360a6615…

MALICIOUS

PDF

97.0 KB Created: 2021-01-09 04:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-02
MD5: 82e93974b60119457949c9ddec0d23ab SHA-1: 1145d669ce11cb4e4efbd992a49a446f49e843d8 SHA-256: f4650c8d360a6615d5813d2298840ec7a45978a606a3bc579a973a8dc32b3850
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/wb?keyword=township%20and%20range%20system%20definition In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372384/normal_5feefbf2b674d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f91980ab8197.pdfIn PDF document text
    • https://cdn.sqhk.co/debaviriku/iehfjfh/66267120252.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/PbKjijb/league_of_stickman_free_shadow_legends_hack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fe2712218e42.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/2c5a3e2a-8f13-452f-a540-8c84a9adb487/a_christmas_carol_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e326662b-59fc-44f3-8bce-34c22e761735/rojafajoxilova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a9afd4-ab22-46f8-be85-6113a3ca8a14/zenezuzig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c69982-6c86-41c1-8afc-e1fded0d0082/94141990053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf91cc8-c5b5-454b-88b5-8567dc778125/1_samuel_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1c9157-6e48-49d0-9fc9-0070d13a2664/first_aid_kit_backpack_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b37e425-42ab-4f05-8feb-1a3c8665ae47/dekodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6400b057-8cae-41fc-ac7d-c9f9796a8024/legef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9486b177-6130-4dde-9cc2-eaada9889aaa/52348553259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fc64df-fc57-4617-85cc-1fdcf985fa66/surface_area_of_a_triangular_prism_worksheet_kuta.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_off00013dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFD 5564 bytes
SHA-256: 1cb0dec0c91af8c332ad503a899e0560ac86f74cc075eef15cd2c6db4871fee1
font_01_sfnt_off000150dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DD 11380 bytes
SHA-256: 67eb046f176c36372b79c191756a691a67e2850febf509ed13fbd32e48b2f779

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