Malicious PDF — malware analysis report

Static analysis result for SHA-256 a642980b424da204…

MALICIOUS

PDF

71.1 KB Created: 2021-02-10 18:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2542fc46676e2674bb42588758d10a09 SHA-1: 20ffed1292ce0e8b35a232b2cb1324a80c3c968f SHA-256: a642980b424da204d7378721c847b074bc8b2f0b70b37e2f6ce7d1af3c12e16d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jottigo.ru/wb?keyword=comparing%20fractions%20worksheet%20pdf%20grade%206 PDF link annotation
    • https://cdn.sqhk.co/vogoxaginoje/jjgTcjd/jake_fun_run_2019_johor.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/hhyjiQB/52533892414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5ff7f4a5e27a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fe6ac752e8bf.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/mxhhYex/top_10_world_war_2_history_books.pdfIn PDF document text
    • https://cdn.sqhk.co/bivotiboma/SZxW7ih/emulator_for_gba_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/ghgshgh/parsecs_to_light_years_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/duwutawuna/nxiihig/the_art_of_war_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_6002e167d202f.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/vidadaviwal/name_on_cake_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/super_fund_performance_comparison_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/vedeno.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/83269831086.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/fiwafibegu.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/angular_6_form_control_change_event.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/esl_categories_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/2127442729.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/tv_guide_adelaide_sbs_movies.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_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 5752 bytes
SHA-256: 2ade78f502dddf4a95189892f1600ff5e7f847aed2ae8c14d2448ad4d7093a73
font_01_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 10876 bytes
SHA-256: 342b7aa900118bead29e090a63590aefb4b0122590de47f18aa5888190cd83d8