Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bb218757c7b91c…

MALICIOUS

PDF

71.7 KB Created: 2020-11-22 09:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 28f950bf3672df9bf4403fde436179ad SHA-1: 63378aae37aa54ee710913a10866b1f1fc219a93 SHA-256: 86bb218757c7b91c6c4f295775e1cf413ff7dfdf2d03985d41e813bb703952fe
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/wb?keyword=ssc%20chsl%20exam%20pattern%20pdf PDF link annotation
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.pdfIn PDF document text
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/visux-zorazesuxate-guratepeda.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/gosete/scatter_graph_correlation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/a_tale_of_three_kings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737a9264-93c1-417a-a0fc-8bc9d685c1e8/jumavobiruniwel.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/pemurorizunivapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b86c83-8e6b-4ce9-b98e-27e5d4f1b3a3/passport_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/manual_allegro_5_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/carnatic_war.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/texas_release_of_lien_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/encyclopdie_des_plantes_bio_indicatrices.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/gym_workout_picture_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/86034809546.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/15872129564.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/yuketen_handsewn_suede_maine_guide_ox_khaki.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_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5564 bytes
SHA-256: d3d70dab8ed08c9ee2bd133128390de9d32bb0f99460e2f860e4cfddbd3e3471
font_01_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 11144 bytes
SHA-256: bf2a4b38381ac236f639db24859b6f7f18f19d8f2f175db11a10226db63a7cd8