Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafe420ee61387e4…

MALICIOUS

PDF

87.1 KB Created: 2021-10-16 14:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 284d23b60c6b75fbed83d992e0994709 SHA-1: 3d89f8a86bd65d22b2ce476e9817d609a29f2847 SHA-256: eafe420ee61387e4bff70e8fa0faba9df9bb71e2dfaf86659f9fdfdaca198639
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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 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.
  • 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://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161487816dd349---nuwerevunolubegiva.pdf In PDF document text
    • https://wic-net.com/userfiles/file/26826137648.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/nexal.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/32439650648.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021100818155899.pdfIn PDF document text
    • http://indemo.pl/Image/files/luwitafapexexaxemu.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/roxumugarizunesare.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/gudelimegeduro.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/69643798836.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/25326755653.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/dofofolowobokanipel.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/76951165526.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16138187392891---78184184866.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/93939731408.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/xoviwopesevezijezow.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/notanonasu.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/rilava.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/97482216475.pdfIn PDF document text
    • https://aayams.com/userfiles/file/noruxojutijamofi.pdfIn PDF document text
    • https://kulittelor.com/contents/files/bekubapakobikajapujikut.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/nusotaru.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/vItLtdF7Pec/uplcv?utm_term=ballad+poetry+for+kidsPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/2348335911.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_off0000ebe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 19376 bytes
SHA-256: 9b08028de2cb5f1785729afcae3b49fbc922b91f912bbe628d2f2c007eb35ee7
font_01_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 10648 bytes
SHA-256: 05fe575253786c688e9f1986569f21732d23ad8e7dfcb3a4717d9b274d2a23c2
font_02_sfnt_off000136fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1