Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee5fa6f42a45842…

MALICIOUS

PDF

62.3 KB Created: 2021-09-03 23:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 08ce2c194115cd459a03ce9ae0c0692f SHA-1: 0c5ca029cd56ea58ab1851659770cc534bd5dadc SHA-256: cee5fa6f42a4584215b15b54c784e5e03ca7d7f5c75d233daea92577e1e63021
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other unknown hosts. The primary purpose appears to be to lure users to these external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5915

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 http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84a240628---40592421162.pdf In PDF document text
    • https://condominiovillage.com/userfiles/file/vadizu.pdfIn PDF document text
    • http://huefpdf.org/upload/file/16795551343.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/vudunaka.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607045985ddf7---najep.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/38568914284.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd3ed2c6e0---xovivavaveko.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/36313564205.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/45187849367.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/661a2d14364229b3b90741ae5fda361a/24076573181.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/bufedoliwazatuxip.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qet9hb9cidpphtbfsb3im7i3ne/56451093198.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/29252239952.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/wopunadejojanuwidine.pdfIn PDF document text
    • https://bauarch.bg/files/1847338286.pdfIn PDF document text
    • https://toocapen.com/files/11031944682.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0f6d4174a57cb42d36b24e6c23c39399/78525252965.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/80020f3b0415c58a19435df97bf24074/fugijenuku.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb26e2313---80795243058.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba795d90ae---vimakowuzuketobetu.pdfIn PDF document text
    • https://tckontrola.hr/files/49893540964.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/28082669880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=documents+required+for+nrc+in+west+bengal+pdfPDF link annotation

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