Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc39744980e4bce…

MALICIOUS

PDF

58.6 KB Created: 2021-09-16 16:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6fc899260dc2c511e19ac571881784b4 SHA-1: 6a181fdb6ebf701eabe99d8ecb8a403ee7a2ebaf SHA-256: 5cc39744980e4bceed9be112cc30c05d57fd865ce8022f4b5ea099d44f57c6d9
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload directories. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user clicks, common in phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7593

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://onderhoudnlgarantie.nl/upload/file/82525240694.pdf In PDF document text
    • https://loctra.net/userfiles/file/74391798816.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/joxogodiliwovufomadav.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jitikitiwijexu.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/19010792936.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c70a35803---gexipipimajur.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/44065288941.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/655a5c76114714db8535379a81cf572f/dobewijixutijunu.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/rugumisakutazesibuxonuzo.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/ruweketos.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/57112102312.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/57018208689.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/12390297144.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/83508652148.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/91251558561.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613502bf2ba67---bazekezevawurolepa.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/kojixosonopomutaranoxudo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613d031e06527---zowegukonedaw.pdfIn PDF document text
    • https://kawanmto.net/contents/files/kumezu.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/gusozilofomudu.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/020206207045.pdfIn PDF document text
    • http://pololanna.com/user_img/files/dizeromupopalonidugozule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=filelinked+apk+download+for+androidPDF link annotation

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