Malicious PDF — malware analysis report

Static analysis result for SHA-256 d850c8f5b7277a13…

MALICIOUS

PDF

61.6 KB Created: 2021-02-10 01:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a4b28670486b2f0588b8354e1b9c1b83 SHA-1: 12c0e1d45baa25e0011d39c10fe74ecfcd2c2a96 SHA-256: d850c8f5b7277a13802342d3f2027e31afeeca0ff5aec88a9b771389848ae843
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/wb?keyword=astmh%20poster%20guidelines PDF link annotation
    • http://anyita.space/27424530916cjrae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_6002b053d92c9.pdfIn PDF document text
    • http://bestgirl69.com/sukesirurutudixejunisumu8ke1y.pdfIn PDF document text
    • http://damita.fun/guide_to_ditching_cabler4vfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_600f38f38c0df.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/wetowuzuxit/bella_s_lullaby_piano_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/chillicothe_ohio_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/60084669284.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/general_electric_company_annual_report_2017.pdfIn PDF document text
    • http://poxizaxo.epizy.com/major_delinquency_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/haccp_principles_and_application_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/19296430423.pdfIn PDF document text
    • http://mutifesojare.epizy.com/chhattisgarhi_holi_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/baila_songs_tamil.pdfIn PDF document text
    • http://zimemotom.rf.gd/petilipusafunatirisalurib.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/43249335113.pdfIn PDF document text
    • http://fugewad.rf.gd/compounds_with_transition_metals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/chakori_movie_songs.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_off0000b718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB718 5152 bytes
SHA-256: 9c760aa38e63382843c3ed47699a68d7203ef3ff639c350f596a059dcddf17f7
font_01_sfnt_off0000c874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 9752 bytes
SHA-256: 01a6138eb68162e6579b3ea143d25075c475d708088a62094ca0dd49ec94c239