Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f91ed63c80c78e…

MALICIOUS

PDF

58.3 KB Created: 2021-04-06 09:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0c68ebcecafce38a2b8d99943ba66f78 SHA-1: 3dbb3e68da6f765be1289580e534628bb1fb7852 SHA-256: 89f91ed63c80c78e64a04e57688eaf1870eae2015e1c9cd3b75b2cab908fcf51
184 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 0.6476

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=water+ridge+kitchen+faucet+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421640/normal_606116986396d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6040a6cc0dfac.pdfIn PDF document text
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/rotefada-xorod-mowipume-wijumu.pdfIn PDF document text
    • https://pemifapizu.weebly.com/uploads/1/3/0/7/130776061/75f5b02e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5ffa18e5103ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_60242215dad49.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/59e2fa.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/4148058.pdfIn PDF document text
    • https://dusalunefawotof.weebly.com/uploads/1/3/4/4/134487283/5124a36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476418/normal_5fc819065540d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_602aaec204b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_6010ca05145f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5ff5fc4853c3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5ffa8b17916e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426832/normal_604dc3978ec4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5ff4dbebae7f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_60290c581d8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_60513a2851c76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_6009e9d3d5bf4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d423c73-8810-4864-aaf6-623038bbebfb/31108053466.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_d8c8a659d8d542d5af009ae0dd94647c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ab72ef-8146-4603-91ba-6434220e0c82/rokawazawudunizupilogu.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_56c61c0afc71430a9cb1a774fba5e816.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_e670e59698054c45ace0c5a236f3dee2.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_a830f7ac58264aaeada676a68338f77d.pdf?index=trueIn PDF document text
    • https://e2685184-9bcc-4d63-b126-5f7cf6655de3.filesusr.com/ugd/267f13_f91a848f77664a0498f2d9457edba9f2.pdf?index=trueIn PDF document text

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