Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c0c7e06692d6d7…

MALICIOUS

PDF

68.2 KB Created: 2021-10-01 20:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 19b60274a1f4baaa98a5cc249f469ded SHA-1: 58190141d4ae18d2b8deb91fdddb437747771693 SHA-256: 68c0c7e06692d6d7f9143b649515243fdfc9f9cb7240171b2e74e9542d670d8d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to PDF files hosted on various domains, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to lure users into downloading and opening further malicious documents.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yourmoneyyourbank.com/uploads/File/noxovosapewejaxiwobakove.pdf In PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/58311823713.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/95087296652.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/87050782214.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/vozal.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c22ddf1baa---deviwebapo.pdfIn PDF document text
    • https://ww170001.linebot.net/upfile/files/20211001074634.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/zivizunigex.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/sivomuzasuvaseberug.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/fixovixilamofudimimujexev.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/lefele.pdfIn PDF document text
    • http://c-six.it/userfiles/files/87400886698.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/vepotowu.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/najowo.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/65615883170.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/94129731600.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/62957852536.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/48873956665.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/nitepimusetegopefikowumaj.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210923_A38CAC9F09C08F01.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/borujarapanebutilekamu.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/50bf60253bfa1206823e31cda160129f/77326218942.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/cdc0a4e4b66325ae99d7e1c2c29841d5/fikozupixino.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210923200459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=more+than+1gb+games+for+androidPDF link annotation
    • 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_off0000af13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF13 14252 bytes
SHA-256: 1995e92c3d02c34732ce1b63d617a20173f6aad63cabded1670ff126ae3ff5e5
font_01_sfnt_off0000d2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 10940 bytes
SHA-256: 8569f0aa04e1c3cb7b2d0ac58cfa763e3fe591dbf40f5f70329284b147ac19d3
font_02_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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