Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95a83ed5353cba0…

MALICIOUS

PDF

53.1 KB Created: 2021-09-01 19:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 879865a860c96c99087ebf74166b1385 SHA-1: 6a4ffeee9ce2d7d5479277e71e341f92fb090d7a SHA-256: c95a83ed5353cba02969c9d18dac71819e92256f6cb0dde56fc9509910c226c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of 'utm_term' parameters suggests a phishing or SEO-based lure to drive traffic to these sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8957

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 https://garglob.ru/uplcv?utm_term=exposing+the+rejection+mindset+pdf PDF link annotation
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/34629b3408ee06d4db4363d1d8f57ac2/boditidaduzunozufov.pdfIn PDF document text
    • https://rotherelectric.com/files/53295487610.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/bugeduzowovusoz.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a0a7cba88---97247943817.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9d80474d---50653689659.pdfIn PDF document text
    • http://edgecs.net/documents/40059717586.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/foxiribijajo.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/29921021892.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cdaa3189d34---demutam.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/97747080358.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/35330771129.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/422513316.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/fb8d49ab1c05f218790d18a77cebc817/lawevulabuvanewebef.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db6799ce53---tazuporebutomidoripuwuraj.pdfIn PDF document text
    • http://chineseclothingonline.net/File/10947238061.pdfIn PDF document text
    • https://coevent.ru/upload/files/kiris.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/87796973960.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/68157376734.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/69579756380.pdfIn PDF document text
    • http://mq-water.net/upload/67364591270.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/dd6c52c0a01a57ec8465dea9467b6649/79584692604.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/62739826729.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/zawif.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/pebifolotatuvazuni.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/fbc8a947ace77c13cd4be8fbd583ff4d/togilo.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9749658868df13da8db9c0df33038a6f/80945750481.pdfIn PDF document text

Related samples 8

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