Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb482161e27da0b…

MALICIOUS

PDF

59.9 KB Created: 2021-03-25 17:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e853cfd4cb938b158f9d62ceb47d75cb SHA-1: 6abe601ff2dad546771e5fa0961cbea9937bd1ce SHA-256: 6cb482161e27da0b2ab699336d740d1dff47ecee18713dcc8f0a505eca0b8e34
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 0.6078

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://soxebez.ru/award?keyword=machine+learning+curso+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389816/normal_6041e449d6b9b.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/xomowuvujexigaw.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/gedaxeseva-fatavupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_602e727de5ab9.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/xiwagik_jubaxalojo_rekaredabed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_603c299e36326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd3297aae465.pdfIn PDF document text
    • https://baripunasese.weebly.com/uploads/1/3/4/1/134131446/waxamixubaneneg.pdfIn PDF document text
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/zubomobipibijub_romon_tezefafigota_mujejurimofupi.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/wepuvorizivoniwip.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/luwevef.pdfIn PDF document text
    • https://2634c7da-0b58-4de1-95e3-ef2217a723ee.filesusr.com/ugd/f934bc_645a1d2cd9f844fda2b2098a400ba4ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/chapter_7_market_structures_worksheet_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_to_review_photos_on_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/zaxedatusofaluwene.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_95507d3bc95d4d98bb98dbe4035a8468.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_909b1c37b7eb4c499564679f7fd9bc0c.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_cd661e07b5364a878cf10f1fa201ec25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jimugivos/1162422037.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bcbsnc_botox_prior_authorization_form.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_55af158dcf7c4fe2820a49bc41bf6128.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/66353203789.pdfIn PDF document text

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