Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ab4f9a0125ed2c…

MALICIOUS

PDF

63.7 KB Created: 2021-02-05 16:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dc7bdd4309f94acb003f325f5e2ec158 SHA-1: d1d6f270e8a97eecb43df883a7101734942f5bc2 SHA-256: 59ab4f9a0125ed2c480db4ad85b319dccf6a52043f28123db3a9f330dfb5cfa8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wb?keyword=quorn%20vegan%20sausages%20nutritional%20information PDF link annotation
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/4e555a7.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/verobipanaw-jugulagiguwoso-fopewojik.pdfIn PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/nimog_zeniwi_xenun.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/mosunof-nakuzogoxaso-vugijavovufitin-xazapuzufi.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/1150244.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/68a2a5.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/47b984e.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/doxaxegefofomiwuro.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/ibQicib/85279214620.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/palikuvexake/agenda_2020_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/calculating_opportunity_cost_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/rukotidelowerumenizo.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/fupobogeba.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/semab.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/adobe_acrobat_reader_windows_7_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_off0000bc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6A 5208 bytes
SHA-256: b48e1f886f0f29adeb2762cc03df1cbd2509de36c30a51ff8700f53d99d1c5b4
font_01_sfnt_off0000ce1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1E 10488 bytes
SHA-256: d8ba837ceebb272826b5c0485e206087ac5f6a49358198d4e8a4eec2768f2232