Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e0538b6a05f0fd…

MALICIOUS

PDF

67.6 KB Created: 2021-02-28 11:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ef005d4db2ef369831c49139c88f955a SHA-1: 10b4149ab9322a8229368a093a180d5b5492d17d SHA-256: 16e0538b6a05f0fda983ac6b07f79045dd5d3b089addb880b1e67f2ec41c962a
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://jottigo.ru/award?keyword=how+to+program+remote+for+emerson+tv PDF link annotation
    • https://cdn.sqhk.co/xumesapaxoku/iicaUic/vonebawopi.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/23ksIwa/planetary_annihilation_titans_g2a.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/bZejf6A/bedifuganifedunigatelesi.pdfIn PDF document text
    • http://wuvijenebomukib.iblogger.org/tijivatamumedupefewirod.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/b8vOcjb/ultralight_aircraft_for_sale_california.pdfIn PDF document text
    • https://jobifavizatop.weebly.com/uploads/1/3/4/1/134108852/7922499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5fec7b7635f05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusibav.epizy.com/creative_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/aha_guidelines_for_aortic_valve_replacement.pdfIn PDF document text
    • http://rigirulame.epizy.com/96684493412.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/zamivowapirorepikone.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/ruzogago.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/aeronautical_information_publication_aip_japan.pdfIn PDF document text
    • http://tezowojisare.epizy.com/lenenik.pdfIn PDF document text
    • http://xadopap.epizy.com/hoover_twin_tank_pro_carpet_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/57901933826.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_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 5300 bytes
SHA-256: f953993b213f243c20535f728ec127332240816bc5ceb21fe70960fc246e3c4c
font_01_sfnt_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 9928 bytes
SHA-256: a65b4e4037198c0eefed250d79434db731957bef898f4f20f211c6820ad718db