Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bb4d8b8fbfde7a…

MALICIOUS

PDF

68.8 KB Created: 2021-03-01 23:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: be1861a39916a8c9d44055c8fcbf76e4 SHA-1: 11f0ae2c4ab66f6a5306e15f7bb985b4f7953a08 SHA-256: 44bb4d8b8fbfde7ab18f108c22bf52d908340b549bd2ae3dcffbd8ecdf3315bc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=how+do+you+use+sea+bond+denture+adhesive+seals PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fcf05cbe728b.pdfIn PDF document text
    • http://vekenuv.iblogger.org/mafebatipodupabigow.pdfIn PDF document text
    • http://ziviludemedo.iblogger.org/zuzukeniburopivufuja.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/viromibukoleliw/dolitimutamulanuzubu.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/will_there_be_another_divergent.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/logical_framework_template_usaid.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/how_to_clean_my_zojirushi_water_boiler.pdfIn PDF document text
    • http://xuxusemo.epizy.com/defending_jacob_book_club_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/lokopoz.pdfIn PDF document text
    • http://zufimot.epizy.com/algorithme_de_tri_d_un_tableau.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/11867051787.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/academic_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/babybjorn_cradle_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/ielts_academic_practice_test_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_reset_maintenance_light_on_03_honda_civic.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/utenos_autobusu_stotis_informacija.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/rawevuvodewulukozejaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/arash_broken_angel_video.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_off0000cd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD76 5268 bytes
SHA-256: d421889a43b419d2326e788eca9812a19791d5a0980bead210136e2e0f86aea7
font_01_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 10768 bytes
SHA-256: ca162fc3bf9651cbdac12288af9fa6bc870fc85c981ef600dbaa555670fc86e7