Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd13aebc39fcf6f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 17:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0dce142d38d14dcd2f6a41cd10e70822 SHA-1: 23939ffe0c2fa8eb557268b60c142ade43594116 SHA-256: 1dd13aebc39fcf6f73de13af6f8f54072fbb102706158feea952ee6501944192
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://maypoin.ru/wix?keyword=osrs+herb+run+guide+2020 PDF link annotation
    • http://lyudi23.ru/dalukepaxizajumojar5uf58.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/namisabijirufipix.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/22509a61183.pdfIn PDF document text
    • http://ighelperscenter.com/los_compas_y_el_diamantito_legendario_descargar_gratisj8jeg.pdfIn PDF document text
    • https://gagavupotiwek.weebly.com/uploads/1/3/0/8/130813998/0534758.pdfIn PDF document text
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/5702d3260c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fdbec5688658.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/wopanebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402520/normal_5ff4b3e4e18b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fffbfa74e4cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tokafanawa/barriers_of_entrepreneurship_development.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/19777587215.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/15205977559.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/5690514803.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/porcentaje_de_cesareas_en_mexico_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 4976 bytes
SHA-256: bd3e2219ff5f7c4104b12f8040a5cbeb1db78d1b3f623ea98577e035bc46b796
font_01_sfnt_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 10344 bytes
SHA-256: 18c099c3b0da534fb2b2bbed5a73cd250d8810b45b75b472f6033371a532cd7e
font_02_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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