Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe6a6216ef63ab4…

MALICIOUS

PDF

62.3 KB Created: 2021-09-08 18:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fbdd412fd856561fccb909b4d888aa9e SHA-1: f0d597ab0382dc9120aa1f9e9d1045981ec6ecb0 SHA-256: 1fe6a6216ef63ab4f0b3fa938d16cc10c6172762ab9225855028540fb538281b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7265

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://pistant.ru/uplcv?utm_term=materi+pajak+penghasilan+pasal+21+pdf PDF link annotation
    • http://cassotech.nl/site/data/ws/files/75473882836.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/35526841909.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312521bd8a0---13739450914.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613633a858964---41285795176.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161345c68aa2a8---kowapubusezewu.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090508350290.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109010015592189.pdfIn PDF document text
    • https://coevent.ru/upload/files/1714394486.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/66088208930.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/95555494997.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/10065388166.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/90812367929.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d0eb43060---83551559024.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/sokukuxawixuxaxuxatub.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/27773594927.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/ronubogasafikixis.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/58479456748.pdfIn PDF document text
    • https://actor-conseil.com/files/file/jevelokolisezepujoxif.pdfIn PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/merixopipakagomujugi.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/19250336238.pdfIn PDF document text

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