Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ce7972e275976f…

MALICIOUS

PDF

78.1 KB Created: 2021-09-20 23:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd0c944b3408e65978d4d95d014529b5 SHA-1: b522cf6ff3f81ea7f5cbd306cc0bf6604c24ead3 SHA-256: c2ce7972e275976feffa01ef799b45ed5c4eb0528e757ae6fea8887ca27e15ff
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest this document is a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

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
  • 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
  • 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://longislandinvestmentadvisors.com/nini/userfiles/file/64752590605.pdf In PDF document text
    • http://myjobcareer.net/userfiles/file/2021090806534373499.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/tipubafuf.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ovvvr49ahn0jktqi2tjp3hgufn/sazozaru.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d69e1df57922ded5145b2296901b6d69/kusopejufugedidelison.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/83115483752.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/solefiroku.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/tatekobulasupa.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/87051184618.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/vereduxafelebakojex.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/3927473142.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/mugoxaw.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/lasem.pdfIn PDF document text
    • http://jinyezi.cn/upload/jideruvukefanutinobapog.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109052313121734.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/mosezajobibetijelox.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/tusubaradavugu.pdfIn PDF document text
    • https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/37996405663.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/wegibegapefezefoketuj.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613407d6c95ec---54586953875.pdfIn PDF document text
    • http://timebymtm.com/upload/files/resemawibadagoged.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/81628141547.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16138accabb77d---luxovujeguzazede.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/wuvexiziweluzoripumeminax.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d532b5f6d---70627188860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=garena+free+fire+top+up+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 10368 bytes
SHA-256: 82ce6d47ee6136c400a6a1f6f2c0c3aa332431789ceb3b0354b9fb7ce2e40a1b
font_01_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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