Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb3e884c1ec055a…

MALICIOUS

PDF

70.4 KB Created: 2021-02-18 10:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0f937df8d2e7d761496235b29d7fd176 SHA-1: 11acee0c470056faa28b0322a31b702faf646da3 SHA-256: 2cb3e884c1ec055a8cebc660b50a97c25e1944f194979c341499fc58a23a3fc9
196 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
  • 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.
  • 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://bologen.ru/wix?keyword=pet+adoption+certificate+template+free PDF link annotation
    • https://cdn.sqhk.co/gobajejuz/qgghaVe/is_carrageenan_bad_for_your_skin.pdfIn PDF document text
    • http://jitokinut.iblogger.org/bottom_sheet_view_android.pdfIn PDF document text
    • http://barbanapoli.moscow/red_light_up_rudolph_noseehlca.pdfIn PDF document text
    • http://jiviruke.iblogger.org/kizubowatexuwuxawelezem.pdfIn PDF document text
    • http://zoosalon.org/dishonored_2_emily_powers_guidexbc7b.pdfIn PDF document text
    • http://bigchance.pw/gonufotapakakigawus4b8ti.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/8564077.pdfIn PDF document text
    • https://zifosugelupoz.weebly.com/uploads/1/3/4/6/134693972/724bcef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rafodize.rf.gd/forma_ideale_bastenske_garniture.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/english_phonics_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/abcd_3_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/best_books_for_5th_grade_book_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/xegokaxuveba.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/candle_light_dinner_balraj_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/57991405976.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_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 5124 bytes
SHA-256: 3d902b23328fded9f3d0d6ea380c8dab6313b3e8b703a658860d65c29319e019
font_01_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 10048 bytes
SHA-256: e254129acd3f9c11dada618b07703436b5da78f802d7270a07727c2ecd7de12d