Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aded688730e292a…

MALICIOUS

PDF

80.9 KB Created: 2021-08-01 09:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 44a2c60123de742f90e1b5e400fa344c SHA-1: 2af0abde5676f9578538793d8b50764e178e2d60 SHA-256: 2aded688730e292a56b0c0c7126482803db0f34a26992faa9d1f9b55c778e329
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified by ClamAV as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised CMS upload directories and disposable hosting sites, suggesting a link farm designed to distribute further malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5179

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://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/c9d045c0a552b6c4529cbd1f0c515bb8/9349413905.pdf In PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/livofapinipu.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/nc0okso0lakc08ftca256rbbts/guwerogadazu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/mibolib.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nthbu1puhqfe3qrhkrat08t9b7/39240155553.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/1459678502.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/86899422614.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2633d23a9---teret.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609250ce0bb57---50297441915.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/61111560548.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f8598622894---56306144645.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/zaxudew.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/92909065632.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/tovokexem.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88d8465b49---terazuxixum.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4ab1521f9fd910492cec68822e04de08/20778518060.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6e304f4c3---66035439684.pdfIn PDF document text
    • http://lu67.com/clients/50962/File/87046173008.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/cbge1ras7fgdbq2aprngr1ipch/domal.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16102c63e3ddb3---19536724593.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/kumawudolipob.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/badipi.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/40918197151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=die+tiefen+der+schmiede+schatz+pl%C3%BCndernPDF link annotation

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