Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e64301651c7bbd…

MALICIOUS

PDF

68.5 KB Created: 2021-02-28 22:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5aae6bb9274019c37c5686719f818134 SHA-1: 6a4cc913bcc668f12aa6b6d66b5859bee80239e5 SHA-256: 31e64301651c7bbde3af2bf6a1b1108c122f32c088b21fe6697fad32d81b8043
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/award?keyword=a+level+chemistry+p4+topical+past+papers PDF link annotation
    • http://gojepifega.22web.org/46378364010.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/egfjghU/othello_school_district_calendar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fd3c2a4838d5.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/hoDDjeJ/18408387933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388424/normal_5fca803332512.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/fGQeigm/bubble_dragons_game_lab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_5ffc2b24da5b6.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/agjjbgj/supertux_download_softonic.pdfIn PDF document text
    • https://cdn.sqhk.co/wisaputal/3Rhbhgg/button_up_short_sleeve_shirts_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/3jgC2gg/8786188261.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/ibqEhgC/teenage_mutant_ninja_turtles_sewer_run_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/gve0hcV/forest_wallpaper_hd_1366x768_black.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/tugafebip/16605942102.pdfIn PDF document text
    • http://bikemeno.rf.gd/89956145267.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/fuzose.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_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 5412 bytes
SHA-256: c2211766dcbe30e8d143b20ba4434087b8de4a3d6595d5b773e2ef7a8c4be6dc
font_01_sfnt_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 10280 bytes
SHA-256: fea299cadca8554d99957c5b80a25088a3691949dae0a00f6b72e3c1b9481597