Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af42c2945d817ed…

MALICIOUS

PDF

79.3 KB Created: 2021-02-28 16:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3b94ab2f13f2769e021511fd36b0cfd8 SHA-1: 946300c41a3274cfca51d04559afc085edd749b5 SHA-256: 4af42c2945d817ed27b020f5db37ffc1a8217929ebf716d729067c9409445f57
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://xajibur.ru/wb?keyword=yamaha%20yz%20125cc%20dirt%20bike%20for%20sale PDF link annotation
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/772448.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/1655697.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/3jiAijh/girl_voice_changer_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/LXhe3ne/dice_tower_diy.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/lulelepese/hospitality_newsletter_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xoderumuwugirix.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/zipirovasuwajikus.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/rojigu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/gekiganivatifal.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/tesaje.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/6487637573.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/monster_in_law_movie_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/circular_pro_font_family_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/37684111930.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/oracle_expense_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/65927526090.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/livre_guide_du_routard_albanie.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/boise_interagency_fire_report.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_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 5888 bytes
SHA-256: 443bd998000a2a98011f66cfc6f32f4521e734d3cf53bcb88d25ba45193ab678
font_01_sfnt_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 11496 bytes
SHA-256: a9584f068e917d4d68abc1d29d804e047b5656649f3e0fe189a8d4c06c6108cb

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