Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62f11e416717c9c…

MALICIOUS

PDF

63.7 KB Created: 2021-09-08 00:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd6c42461e8136567749e3dfea53f18f SHA-1: 1218c2dc031242e093687f6ff770a76a8c9e1122 SHA-256: c62f11e416717c9c2d981b290955dcc4a778270eb944365171e1a5ebbdce76b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

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://zhbiotech.com/CKEdit/upload/files/55136936731.pdf In PDF document text
    • http://ttlh.vn/storage/ckfinder/files/13454192813.pdfIn PDF document text
    • http://rld-carbon.ru/file/juxesufegadogavorevava.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acef2ab51bf---duxusilikip.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/roferimevosakixud.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/xelikal.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/33021106859.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/3f2d942e32ab8eefeb25d7f2f1b259aa/ranarimevine.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/8366305168.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/malipiko.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/27178321749.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/7569506625.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/78570198017.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/ziviboleke.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/13891870659.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/63925755069.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/leboresatefew.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/1401f8b068a84c8dba2d958cb8a8784e/37273190710.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/zesazukikakatajovule.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/3f2c90c6cee3e0341e487d0d8aa8b063/26028422362.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/92663776206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=communication+meaning+types+and+characteristics+of+communication+pdfPDF link annotation

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