Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e88d07bf069b6d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 10:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 14d12ae3a50911ec180b6fd675fb5291 SHA-1: d455550a82bbeb67a22a14c6303722a75b20311f SHA-256: 24e88d07bf069b6d534fd20b0d00e30b09e0b69fb6592e1ba23b1392dee3c20f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://jikaramen.com/uploads/files/kogegozapegimelomevesejis.pdf In PDF document text
    • https://thebottombillion.org/business_school/uploads/file/xixujokenubuga.pdfIn PDF document text
    • http://393citizen.com/upload/files/suvavu.pdfIn PDF document text
    • https://parfumzone.ro/files/file/43156269548.pdfIn PDF document text
    • http://esejsc.com/upload/files/59027859357.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/93949487734.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/30696981898.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/27167083488.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/veteg.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/86552756926.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/73895442265.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/94465409816.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/putalemesisorogasolag.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/88750389862.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/wuduwaxinivudekoto.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/rifaw.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/woxaradopekarovosodunolim.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/mugaxebozarev.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210909092140.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/ravononopogagi.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/24137525517.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/nokowakekafudo.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/27565326566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=put+text+on+image+androidPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/fevavozeteta.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 17488 bytes
SHA-256: dcf30ce561ae0b8fb4b243775ac1388c9c2f3558b567dc276eb5b3677c7f1d7f
font_01_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 10580 bytes
SHA-256: 4ee86457725c7349b82aa0a48848b36eae6bb9c1dde8d7c45342cfd2deebeac6
font_02_sfnt_off000120d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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