Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bba5d3e19666b1e…

MALICIOUS

PDF

76.9 KB Created: 2021-02-26 05:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 07aa1e8b52a864bc69814a41f1d16a5a SHA-1: 4b663dcfb5a125db97b6c09ffb9a48cc60d1042a SHA-256: 6bba5d3e19666b1e6f1d350a352044b3a2cfd31db105858cd80594dc98550761
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://druttle.ru/wb?keyword=romeo%20and%20juliet%20act%202%20scene%204%20summary%20sparknotes PDF link annotation
    • http://sijubuwejipamun.mywebcommunity.org/what_is_place_value_in_math_1st_grade.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/the_count_of_monte_cristo_abridged.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/zUhcgca/cat_run_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/ii1hhgh/home_restoration_experts_nj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445557/normal_5fc86ce753845.pdfIn PDF document text
    • https://fepaxawasebunud.weebly.com/uploads/1/3/5/3/135327574/vabevudapulavafisat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_602efc1a9fb55.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/phhbifb/70882960248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_600c3f9ca8b76.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/harbor_freight_scroll_saw_vs_wen_scroll_saw.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/how_to_clean_samsung_washer_filter_top_loader.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/gewisetug/rj_prescott_the_aftermath_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/present_simple_exercise_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/napirulagujadepujo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/34875448422.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_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 5688 bytes
SHA-256: 48f2e16497214b959be2811800566d2b79db2e404d1e50000443d05ed8913a0b
font_01_sfnt_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 10208 bytes
SHA-256: 78b4c06a12f33df6983849c3f623fec110be7fbab3c35a0473e28ff4434dca24