Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c2775e6a54a0a7…

MALICIOUS

PDF

68.8 KB Created: 2021-03-07 08:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a51b1b1e97ef4d78679d6c068ccda83a SHA-1: 972db344b24656673bb445ea626c47d33c64f819 SHA-256: 21c2775e6a54a0a76fd194392d356257dfd3458d2564bc69ee815d577e78e816
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://gimoguvi.ru/award?keyword=diccionario+espa%25C3%25B1ol+en+pdf+descargar+gratis PDF link annotation
    • https://cdn.sqhk.co/jijasitov/ibhhhfw/steam_cleaner_for_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/do22nHK/neon_live_wallpaper_free_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5fee4031be347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5ff7842349f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_5fda801a29d35.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/QJhdhbo/lujevupanewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fc5749b81942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_60262fcc94f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_601546847ea04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fc7581e93407.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/mizeteb/35812805463.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/nigukadepatesegoporaxego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2bae71-e716-4f18-a415-f2e15ee8ae12/xujusanav.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/sulizisirirofunakaba.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/queen_innuendo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/podarulalaxufogegar.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/christopher_martin_cheaters_prayer_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/7143939412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac5862f-fd36-4d27-9237-297d14adff36/xbox_360_wireless_controller_price_in_sri_lanka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f73d56f-c11a-4d20-a376-ac3e1390fbdf/john_deere_tractor_mobile_repair_service_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/please_be_guided_accordingly_tagalog_version.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_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 5536 bytes
SHA-256: 61b328fe07c61d1c25ec9648f92d16294d9bf43ad55b72754f15c0a9d5e8c2da
font_01_sfnt_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 10892 bytes
SHA-256: c979581d98409f6f48d63aa990a70f5d5b952163ba394cad80ea01518c64f0e2

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