Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3315d8be7979e18…

MALICIOUS

PDF

64.6 KB Created: 2021-02-21 13:37:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d25a4a65dd0b21809ff9a5be1ab400c6 SHA-1: 9d568170e120edc2bd295520bdddbf6157c7808e SHA-256: d3315d8be7979e18ff08f9be1226ce19c360563176d3361cc831e069861c6d3e
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://leonvi.ru/wix?keyword=manual+de+funciones+de+una+empresa+boliviana PDF link annotation
    • https://nakowubolitek.weebly.com/uploads/1/3/5/3/135349387/sulilajozuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fe9f1afcd1ca.pdfIn PDF document text
    • https://kisimerib.weebly.com/uploads/1/3/4/6/134697331/mopebitikalus-mofulusoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a5e8af304.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/9379677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_601e622a019a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_600de4f8bd2e4.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/4422114.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/sosupejuxofedo/57533555984.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/sheet_metal_gauge_chart_in_mm.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/english_font_style_ttf.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/certificate_of_recognition_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/81079105232.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/darkness_rises_gear_upgrade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/ib_business_management_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/14119106970.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/mla_bibliography_format_journal_article.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/gottman_relationship_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/felanaditodudari.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_off0000bd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD81 5504 bytes
SHA-256: 426df4198a4c801148c219f3865aff44b95fad6f84c31073ce24b0afdfbcd549
font_01_sfnt_off0000d034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD034 10716 bytes
SHA-256: da369f878752b4d83009f91e9cbb7a87f70926ee211b38271d0dc3c3275070a8