Malicious PDF — malware analysis report

Static analysis result for SHA-256 231aeac07bd25118…

MALICIOUS

PDF

59.5 KB Created: 2021-09-05 11:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 20571305d3b0c3b92945bc554e1b79f6 SHA-1: 095a4c57093d23a549cc9951736ed7240d9c642a SHA-256: 231aeac07bd251180d517ac7aa69b9b7cad2e5c93a619ac8cf5bdff40df7a698
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The document body is heavily obfuscated and does not provide clear instructions, but the heuristic firings strongly suggest malicious intent through external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7578

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/n7h9goojia9p5qk5r56vpusl4i/kizarizokofuzus.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608650fcf3f1d---1051162876.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/80117593289.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/98459944526.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/lefixiwo.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/zepifejixipudekatuvif.pdfIn PDF document text
    • https://bamor.org/userfiles/file/vuzuremumifixezagutamisop.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/73296667881.pdfIn PDF document text
    • https://lemanssrl.it/file/wirek.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae260a89983---seputiterakowe.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/nobavizusumijunak.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/lebole.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/51413233211.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65866859340.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/bokijulakil.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/nileworuwanovuzegusopu.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/85591133098.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a7c14a380263cf1482d6700f67203fe0/dolenufomutu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fa9b2a9a---selufe.pdfIn PDF document text
    • https://smoothnomad.com/wp-coIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=leica+minilux+manualPDF link annotation

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