Malicious PDF — malware analysis report

Static analysis result for SHA-256 241a31aa66ab0d87…

MALICIOUS

PDF

53.1 KB Created: 2021-03-11 16:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0952b164ceda082ecba83ad71c44b67d SHA-1: 7b6e493894a75c66e915be2a88c79407351217b2 SHA-256: 241a31aa66ab0d87c80bd3cf06ae0e3a1b99f9dce949eab3d4d0c1b2723ee827
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9189

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://pelibifir.ru/award?keyword=chest+guidelines+2020+pdf PDF link annotation
    • http://filuniguwol.22web.org/44657600424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_6041c7b45ae4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_602d69a2bb2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_5fdc0179177b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_602d83d197bc3.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/19839248406.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/learn_python_programming_romano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251dcbf5-ec54-46bb-b32f-5544c30df265/tuwalubapadebedumenixego.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/52400811131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004eb5d2-09e6-43ff-977c-fc3a6058ee0d/benetefesitatuxek.pdfIn PDF document text
    • http://nezenomawaza.epizy.com/wuwejuvizodujotexaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f4d9ba-28d0-4d5e-9b87-31efc5f0aa6a/everstart_maxx_78n_reviews.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/wonojujatovazunujev.pdfIn PDF document text
    • http://tipikirobis.rf.gd/catalyst_2960x-_24pd-_l_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/sovazorujerebonot.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_704feef146664a42b3d4d042663714b6.pdf?index=trueIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_7922d6966d7441f793a991e4101cf5bc.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_f8bf08cdbff8412a826f3cc70a69adc9.pdf?index=trueIn PDF document text

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