Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e871e4337700b4e…

MALICIOUS

PDF

73.5 KB Created: 2021-02-19 03:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a77c53c324dafd3d787daf159070fcd4 SHA-1: 97ad28d8dff55922d6ef430490f71db4f26691c1 SHA-256: 7e871e4337700b4e1706a4ced80c5b99809036eac56c87bfd19e52189f7aab76
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=rii+mini+wireless+keyboard+touchpad+combo+x8 PDF link annotation
    • https://cdn.sqhk.co/jojipimuve/hbO2ihZ/zitosikuw.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/fha2mhb/kobogovawevanuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/jOUljcx/pokemon_go_shiny_list_september_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/rjihgeO/black_rifle_coffee_owner_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/sivofedexim/NjOidgg/zombie_infection_mod_1._12_2.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/gjKyRgi/39509854317.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/hfiap22/24508771225.pdfIn PDF document text
    • https://kimubewej.weebly.com/uploads/1/3/5/3/135329621/8831504.pdfIn PDF document text
    • https://bugomalaked.weebly.com/uploads/1/3/5/3/135324661/d8b6cf644c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493917/normal_6025f3b8b3c60.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/zomokegelalebo.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/ia6jjgy/nuzudaxireliro.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/bulujono/lomezudetomigajemapiwet.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/cv_format_free_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/project_intake_form_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/gojafulozupifugukakuzan.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/88975392127.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/30753127223.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_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 5980 bytes
SHA-256: 76d1f1a8b2b7c019a0d1baa23b3572a6e24ecf49560f217506a0cd4573d1ecdd
font_01_sfnt_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 10880 bytes
SHA-256: 057d763014fb0bb8ad91d40b8d5fd24e7d3a035887149928aea2e63affaa5c9f