Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8debf052552d100…

MALICIOUS

PDF

140.2 KB Created: 2021-08-20 11:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 17d549dde51d85020c53ace5f5639713 SHA-1: 24611075afc91139a5e2fa9a186c336e52197b10 SHA-256: b8debf052552d100574fa028f56ee8f54f3cdf32262024c010036965401585bd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3215

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://granitemountainranch.net/userimages/17521951566.pdf In PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/biterewuzudedona.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/xogunososarokeze.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/31191351973.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/zusap.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/tikarulaben.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/d516b601c2b48cc5eaae2b1d7a595e59/vudabepevukega.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6849eaaf7cc446e5ce95b4d271b8bdf8/26652094225.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160983220c62fe---vubasuseriwebetisadunigud.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f1105f5e0---53993663749.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/88137229055.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/golorabuwaw.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/51335090295.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/61f006cfba5fa0f474d799982aef3b2d/51448600737.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lmojg8dpp70u7so8t3q0i6rmmt/lawamirurefewadofiwomevi.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/35826682162.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a641bf8d580---30071340165.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210629_4C190C604085772D.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/42026952160.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/kuwidumisufixajenuw.pdfIn PDF document text
    • https://wineart.online/userfiles/file/74082741823.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84a240628---40592421162.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/67830843834.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/969dhknk7n4b8u8g9edd7k9ccu/rojilidadolovidujowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+salvation+according+to+hinduismPDF link annotation
    • 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_off0001c89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C89D 10844 bytes
SHA-256: ac07ceb1423a869f56c0ff6268f4c2ecb38bb544e42bad10f79405b83a544ea8
font_01_sfnt_off0001e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E144 2188 bytes
SHA-256: 5ede7e7f9732d31009795003d009ba6370078fea535698c4fb2a06f05d9b03d1
font_02_sfnt_off0001eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAF4 21676 bytes
SHA-256: f9fb505c57596e7aaccc6fe78d094ca536de69a039b4484854033901ecb04ca3