Malicious PDF — malware analysis report

Static analysis result for SHA-256 2362595a977ae68a…

MALICIOUS

PDF

88.7 KB Created: 2021-09-01 05:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 08fef2f3ecc90821bae629ccf8fcf090 SHA-1: 473b494538628fd1b10ac75ff493c33ea192e6a2 SHA-256: 2362595a977ae68a65f23d9aa73a53bfae0fd354a8ca7e814e24dda9a69b53fb
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 0.8885

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://chcial.ru/uplcv?utm_term=ncert+solutions+class+8+science+chapter+6+question+answer PDF link annotation
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/4q7ki7mnosfept11qqq8866cj7/wixumilive.pdfIn PDF document text
    • http://intergeored.com/upload/File/nisanudorokusen.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecf14ac087---18455255008.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b83ce415325---migimurawusatapato.pdfIn PDF document text
    • https://wecareprogram.org/images/file/74836120018.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50a89b87dd---vukudisosafifopupasik.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/56216309609.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8dffa0f1c---sepogugab.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3628e25a8b---zejutizerowebubewakekusaz.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d828381e---momerezimo.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/93524753987.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/fifibanebufijoropo.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/mopufixetemixevuleri.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/tifalugikapalidirixada.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ac4a4c700---migijigemazatuvuki.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c626401be9---luretosuwepejanum.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cfpj7cddsogg3sde5uechiisql/45126258549.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/852b35cc6040880c110debaee4c486d7/23231092264.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/70264013855.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16112cb68ba8c6---vomajutotulapidivi.pdfIn PDF document text
    • http://clickvay.com/upload/files/wopaxizojukosakal.pdfIn PDF document text
    • https://cecprint.com/images/file/rukiduponejibowawaxoge.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4f0d0b770878a9ca8574d23b487f196f/warafizo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13286 18900 bytes
SHA-256: a2bb8eda3314c7d058688fc50c13936109a2dcf2629e9b4ccca44b8d0d8b397b

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