Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ae2814fecce3a8…

MALICIOUS

PDF

169.4 KB Created: 2021-06-22 11:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 165493f02ad0edf22a44408c4b08ff45 SHA-1: f10a3d52a894e4991d1eb1071c71f0e5b2cd54c6 SHA-256: 43ae2814fecce3a85efde66b041afd09bfa590a1d1dc80d5ce148ed143b36b1c
154 Risk Score

Malware Insights

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

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a link farm suggests an attempt to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

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://irlanc.ru/uplcv?utm_term=bo2+plutonium+commands PDF link annotation
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607149267b415---35577969644.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/pegijov.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/gukararorijiweguxawe.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ada744edcb---wozikozo.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b58b77fd06fb3c969213b796df83e94e/petusujorapip.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/dajividawibajevebad.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/59704668215.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/kagosijowukosobidivux.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/baramuwerivavodovaf.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ms19ftekqul40c2jgr9mdudkst/litoradimadebu.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088794868bc7---savevobanapa.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d182fad6552---wababilozodipal.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2d98f409---48588141820.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/tajumuzumagizo.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64967096635.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/lipofefenetuguvazip.pdfIn PDF document text

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