Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a98c73d44bee001…

MALICIOUS

PDF

52.1 KB Created: 2021-10-04 17:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d45bb62e2dc4bc60643176dd2ae3ded8 SHA-1: 048e165f42ef1eb283f523eac83fd1e02c45424f SHA-256: 4a98c73d44bee001f9e4587572c74df3e97e87cbcf5a7f05bf27e84d81c1beac
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6986

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=accounting+for+charitable+contributions+gaap PDF link annotation
    • http://asja.ua/userfiles/file/xulolelijejodopuxo.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/65418113728.pdfIn PDF document text
    • http://belloverde.net/emailer/file/vaxexabobaruwo.pdfIn PDF document text
    • https://evenements.gipso.org/ckfinder/userfiles/files/55917966511.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/47795590614.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/8sb5h8qe26279q3v7ar6rj5pe3/sezutuvumizokemifir.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614c42680d777---xuzukonafesejepum.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/86821635273.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/potozabudinevopumopetu.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/3238017997.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161517206cef0e---44475082289.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/46343401893.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/44102133545.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4301189376.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/pevapajuzowal.pdfIn PDF document text
    • http://hbinpol.cz/media/images/upload/file/woxufamibobaz.pdfIn PDF document text
    • https://kapefashion.com/files/files/nawinaxepezitosasekira.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/70764670578.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/75293796604.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/23018298006.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/tegeniparitovisal.pdfIn PDF document text
    • https://braus.uz/images/shared/file/96853792199.pdfIn PDF document text

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