Malicious PDF — malware analysis report

Static analysis result for SHA-256 98be21e507449519…

MALICIOUS

PDF

76.5 KB Created: 2021-02-17 10:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 59e0fe9760f6b4e29a0bd10c049e63c4 SHA-1: 1e974510e040231be46cf356e431f94a24124a7f SHA-256: 98be21e507449519b69d86e6fcc2092e0384a6f8eec29f63b685732d9ab94102
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/wb?keyword=star%20trek%20the%20next%20generation%20season%205%20episode%2020 In PDF document text
    • https://cdn.sqhk.co/jabosuve/fggghhf/tanks_a_lot_game_wiki.pdfIn PDF document text
    • http://dvestideyli.xyz/21783210956ys5ia.pdfIn PDF document text
    • http://cafe-cok.ru/employer_s_tax_guide_to_fringe_benefitsvugk2.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/8053351.pdfIn PDF document text
    • https://kavosoxevab.weebly.com/uploads/1/3/0/8/130874108/9e982c.pdfIn PDF document text
    • http://getveran.site/20389592674gwub7.pdfIn PDF document text
    • https://cdn.sqhk.co/divekezor/gdibgcP/87758923940.pdfIn PDF document text
    • http://cmbclientes.com/55753250328bbcj3.pdfIn PDF document text
    • http://alisabor.design/is_telegram_x_and_telegram_same4p22l.pdfIn PDF document text
    • https://lozepexowazabi.weebly.com/uploads/1/3/1/4/131409761/badfaf59acf8.pdfIn PDF document text
    • http://emirofficialzm.com/delorme_inreach_explorer_two_way_satellite_communicatori1xvy.pdfIn PDF document text
    • http://edaruzal.xyz/6410411549393mtn.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/muvarelo/alphabet_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/58495626359.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/kuxiselugifefogudukuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/alta_ut_snow_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/reading_comprehension_worksheets_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/what_is_the_dominant_stage_in_the_life_cycle_of_mosses.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_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 5824 bytes
SHA-256: 2274575b7300ab335571835ec877e0bf9e8c3f59c7a5905ce37b94813aa7587b
font_01_sfnt_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 10340 bytes
SHA-256: 8a79b85d1c593ece5c24108a64dd98b7b8e21824cb3bf553bfa02eff428e9144

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