Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1ff47b69495b19…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 12:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: df08b45b74fb83a35d6d107e6548d386 SHA-1: 289e1821f902a316a4b27250582db7b7ae9ea413 SHA-256: 8d1ff47b69495b194870fa8f2068a9bba843964f38a33865f8700bc06382219b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=polynomial+review+worksheet+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fdd42f403ed0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce4da04efe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458827/normal_601f5efa7cbca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fc6bd18f182a.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/besafefaf/10485541265.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/bhakta_tukaram_full_movie.pdfIn PDF document text
    • http://lokutoge.rf.gd/angle_relationships_review_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/video_editing_course_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/52514013506.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/phpspreadsheet_create_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/wekupudetonafasidajiz.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/gift_guide_for_mother_in_law_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/alphabet_with_pictures_and_words.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/28163153418.pdfIn PDF document text
    • http://ritarejameja.epizy.com/adobe_indesign_cs6_brochure_templates_free.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_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 5244 bytes
SHA-256: 6db18f3870a58f3eecf587b5f42e10a8c3cac6ebc5fd722505b801bef4904290
font_01_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 10148 bytes
SHA-256: 7a63a09d9841c12fbde14cd0e5741d14ae961b29a04e58b6a58bf7b384c6bbed