Malicious PDF — malware analysis report

Static analysis result for SHA-256 05875617325b3a7e…

MALICIOUS

PDF

47.1 KB Created: 2021-09-28 14:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3cb504b7bfe91b7dc8a4cbe48871cf3a SHA-1: 9c58712ba14ac29beec8bfa5f4deed72195750dc SHA-256: 05875617325b3a7e1243dd12d84f3c2b9abfc7a5dbf2df737d381fef31290fce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of multiple external URIs and link farm characteristics indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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=how+backup+android+phone PDF link annotation
    • https://chokysitohang.com/Uploads/userfiles/files/70491476118.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613bec821e18a---lapajuza.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/39262972248.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7745e45cd7db7c0156ad3f3cba82b3cc/genud.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/julafoniridel.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/26799865094.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/21439841618.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/geranobuxofajibokizim.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/97133307571.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/bugaletu.pdfIn PDF document text
    • http://cartopack.be/Images/file/tepekamuwejuzevemar.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/dogajositasujukuzosiri.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/54736870122.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/72899826185.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133619283734---kazagazevuninafoxuk.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109232021355482.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/12119587133.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/88424529570.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/18134574729.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/64743957957.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/pexakazalofupitoduli.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161516aea0f129---vikabip.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/famaxomevadob.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/98435195688.pdfIn PDF document text

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