Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9aa355b66ff6f9…

MALICIOUS

PDF

64.0 KB Created: 2021-09-05 15:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: fb46c00c36002ad721ac3edd52c14e4e SHA-1: fddbfbcab762000b1d509bf6a63663b64871ff97 SHA-256: cc9aa355b66ff6f98e18738ff8407eeae1628e2b2d72a3d898111ac83ddad1ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5690

Heuristics 5

  • 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
  • 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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbae2db6e0---28364303998.pdf In PDF document text
    • http://elite-nails.pl/Upload/file/25226951460.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/372b43f1df4833765a3d84e523d74634/16673542118.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0590caf43---31163810619.pdfIn PDF document text
    • http://flexicourse.cz/res/file/xuzuxalitewuf.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098b85428ceb---16761691809.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/46e7aefe69e41fd4b7c94d7518e3219f/25693928496.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/00b35cdd23496b23cd50e67d0bae7d32/nexorefenarokanud.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/kerowof.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612730451afd4---84651311621.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/38789192251.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/99350336583.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/de178d47da56e59cec74383ad9125708/mowozalunegiwejowunugenu.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/marew.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608479424f395---62041869960.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/8707355054.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/91572155049.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/wijovibagafotivaminalen.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/jokasosubomilepegexopog.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/dfeaf0e7b000e7d22c2dae04d934bf14/rudososamozuz.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/76520374621.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/monosi.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zizam.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/nevutimuxufatuf.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/90985080656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=nicotinamida+pdf+uso+topicoPDF 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_off0000ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 10580 bytes
SHA-256: 444842da1584f9a45b1242f09a1be897d2906754cebcf1f822aa20b07916ff95

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