Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e67c4b4f0ef7578…

MALICIOUS

PDF

53.9 KB Created: 2021-09-03 21:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d794b353a8ae19613badf6099220cf5 SHA-1: a69d45a23bf4355389a6f4f9e84fc7314942ee70 SHA-256: 2e67c4b4f0ef757857df3d2e31fca95e7cf2710af76ec4113cfba8a58f64b201
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple PDF files hosted on compromised websites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier also flagged the PDF as malicious. The primary purpose appears to be redirecting users to potentially malicious content or for SEO spam, rather than direct execution within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5894

Heuristics 4

  • 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://dom-2000.ru/ckfinder/userfiles/files/48203616415.pdf In PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/77418310929.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075781df1311---93988577816.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086330124bcd---50868506671.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/fosodufogenevu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0392968a59---94882564740.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc8fd4d45fad8c9dbf6ef34f2aa365ad/badeguluro.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/12254587322.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/4b1101b8038e2ebc370cdf6c12ffbf9a/xizezerufimowopesal.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a600a6b7269---64156846458.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petisalarap.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3a9c997fc---87455332551.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/73846893788.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/tanojoxisegipotitepub.pdfIn PDF document text
    • https://esvigo.com/upload/files/66714675003.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/491aa0a62f00e46154c48219682365f4/sixutalem.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/segezezefigodoxotumu.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/67051238145.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/66729713107.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/n985nhp6g8p36610k7mf665bm4/66495890679.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/43088693999.pdfIn PDF document text
    • http://odumakus.com/uploads/files/saditox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=high-powered+investing+all-in-one+for+dummies+pdfPDF link annotation

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