Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bdb1807349bb63…

MALICIOUS

PDF

69.6 KB Created: 2021-08-31 12:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: af99034661bfce6cb66d462459805aae SHA-1: 77ffa7b10532d92f475b5248b8388a2bf126eb29 SHA-256: 14bdb1807349bb63bdf4b26a65830cf413b1729d11a670ef137ce94353ba08ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains. Heuristics indicate this is a link farm on disposable hosting, with some links pointing to compromised CMS upload storage. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware via the linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8495

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://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7562b8947---jepaluridomagi.pdf In PDF document text
    • https://charlesstreetvideo.com/userfiles/file/65748346556.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/dubinilezawutilate.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bc8aaa6c2---34250326831.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/28515874528.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/sd0vgkaue6arbj7hq3rfskg8bq/bupebolupolifikikiza.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a5a760f746ae63c286dead1e8cde5edd/ramexadedesawu.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/dubewigot.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/91380521023.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9f601743---92747586321.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/iqla6pln9vbeqcg2ashabofbl5/59556345244.pdfIn PDF document text
    • http://geose.ru/userfiles/file/59499687147.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/34843101934.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///nuwekibukosasul.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a65483b884---repokojuzagolurusami.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/laweredobewabof.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/74799079764.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/uag1bhn634jkljcgm1k9ov8afj/45176998481.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cee731d2f---13512636497.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/gumixalivazofixamuzul.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/30457286418.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/85485132733.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/45619871558.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/9099aa0728b3b96229c0bb274fb15150/92766418401.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/65262243262.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/f7129af546e57ddf7f1a9919b46a3b5a/68278990603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=happy+prince+story+in+bengali+pdfPDF link annotation

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