Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb0431fe3d3ad0a…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 16:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5261d9789c9c20fe8998b6ca64e371c6 SHA-1: 4fac384d2237eeb21183ec3fb643a6c3cd49c3c0 SHA-256: 8cb0431fe3d3ad0a1dec7f754c04f515ca811fce8b590ff120f824190c7e9176
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=troy+bilt+xp+7000+generator+troubleshooting PDF link annotation
    • https://cdn.sqhk.co/kopenanum/rh4v4gg/infinity_symbol_meaning_love.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/ZjdhfzI/studio_photo_editor_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dujepiwewi/Thiqjh5/luxukapamokimot.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/hgPTbjd/mitolokumawexugilafesov.pdfIn PDF document text
    • http://befemoxujutebi.22web.org/systems_of_inequalities_word_problems_notes_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/igshgjg/how_to_change_lock_screen_wallpaper_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/TlV7ie9/nakalubakubupol.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/LOjjLwX/wwe_network_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/jj4jchf/vurul.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/rubidokezive/brenda_fassie_albums_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/twist_kamariya_song_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/shazam_apk_pro_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/it_consultant_cv_template.pdfIn PDF document text
    • http://zevizajezu.epizy.com/google_sheets_merge.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/2019_monthly_calendar_template_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_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 5564 bytes
SHA-256: 8dd16d96ff8db70a6e611a455968fe51929891f319104fee6c9e56c0a7e0be45
font_01_sfnt_off0000ec04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC04 10380 bytes
SHA-256: 4643b44220836a84494096dc5b4b2a30958be31cace9a88c599ca46045105ba8