Malicious PDF — malware analysis report

Static analysis result for SHA-256 d742d773223c245f…

MALICIOUS

PDF

42.9 KB Created: 2020-10-26 15:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c10daeb46779d25d76a244cbdf9e28d0 SHA-1: 4072c8e66781955d2e2e512ee34ff8a87151fec5 SHA-256: d742d773223c245f1d2ebb045ef1fcadb5d764786420f371b2f0cbaebb704ef8
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=turbo+c+4.+5+for+windows+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5f952443f2fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8bc9355da97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f889c641aa16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5f94e06f55c6a.pdfIn PDF document text
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/wunidagulomi-zegidituxawow.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/rodijixub.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006528.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006528.bin)
    • https://s3.amazonaws.com/fowikorejodi/acca_f8_kaplan_revision_kit_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/rokosujagigesix.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/20052013153.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bachelard_epistemologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7085/2762/files/vomefolekeburuxesozer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/direct_variation_table_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/whatsapp_transparan_terbaru_2020_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/tee_shirt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nusonumimuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2817/0910/files/1972462758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7203/1382/files/bosel.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 extracted file (font_00_sfnt_off00006528.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 5392 bytes
SHA-256: 78a55417f318dcef65981adab626e7ebec3a26273ae47b72d63c637be60fefd3
font_01_sfnt_off000077b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B4 11324 bytes
SHA-256: aa1c056ac5f8fcc4e23b93fb6440b9eb0663743c1dccc89f68ad062015aec941