Malicious PDF — malware analysis report

Static analysis result for SHA-256 351aebbc185502d3…

MALICIOUS

PDF

54.6 KB Created: 2021-04-28 06:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7beeb466d265a546d7cca955d9ac6e95 SHA-1: 5c1f20e03e28881bd44b8dbaaba34b25b9539269 SHA-256: 351aebbc185502d348df02e42681a72b3d3ab7f1d7205dbbf45f6fc12c9cce3e
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 0.9152

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://lozipotod.ru/strik?utm_term=calculo+con+geometria+analitica+swokowski+pdf+libro+completo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369516/normal_601ad2f577600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fd05d504bd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_6067da56c8e18.pdfIn PDF document text
    • https://zewijevatijafat.weebly.com/uploads/1/3/4/2/134265582/xesiwatedog-gopefuvojur.pdfIn PDF document text
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/5827145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5ff329a6973b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_6033959f426e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_6013b7102bc82.pdfIn PDF document text
    • https://sunotutosa.weebly.com/uploads/1/3/4/4/134402565/6673687.pdfIn PDF document text
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/c822f3456dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_606e892dd1b1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426080/normal_5ff1224199795.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/6093401.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/17820303226.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_a8c28ec7d858440cadeb31ed3252795c.pdf?index=trueIn PDF document text
    • https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_611c3875cd4342ccaca9bd17ead55740.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/lisalejepazedizugu.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_28b7fc98f100476eb008f07492b5f466.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/offline_blackjack_game_pc.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_5641407cb15d461db9bf22ae12518403.pdf?index=trueIn PDF document text

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