Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71b8814bd330325…

MALICIOUS

PDF

50.6 KB Created: 2021-02-07 20:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 51d44b8d78ab7dbfe0e57d34e7dec9a1 SHA-1: 9ba4e480c50766798288182d207ab91be2546498 SHA-256: d71b8814bd33032590092e781d1376c2d0f4097a9669ed42bc7a69c832838a15
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO manipulation or phishing campaigns. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded links likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9372

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=tchaikovsky+piano+concerto+1+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377371/normal_5fe2321147df7.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/gc6PTha/rechargeable_aa_batteries_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/nenoserod/jcMKKji/cracker_barrel_hours_covid.pdfIn PDF document text
    • http://lozajakar.iblogger.org/nidoxinojavimemogenagewes.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/njhhdac/14307240371.pdfIn PDF document text
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/gafametovubel_jipukowot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_600a4cd7c47d7.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/ieNgcHd/34720907732.pdfIn PDF document text
    • https://cdn.sqhk.co/sifapudoxig/hugcigB/skred_messenger_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/UxFjhCf/bubble_sort_3d_color_puzzle_game_4-_82.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/jVihiav/21025683817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5fe4b59474219.pdfIn PDF document text
    • https://vukibipodut.weebly.com/uploads/1/3/4/6/134690361/repivezoletajopet.pdfIn PDF document text
    • https://pabametutib.weebly.com/uploads/1/3/5/3/135317572/foselojefawa.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/fShgdtu/warriors_orochi_4_ultimate_new_characters_unlock.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/free_addition_worksheets_without_regrouping.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/ashby_materials.pdfIn PDF document text
    • http://momubitirukoj.rf.gd/retention_money_guarantee_template.pdfIn PDF document text
    • http://lebekuwawelu.epizy.com/how_to_filter_color_in_google_sheet.pdfIn PDF document text
    • http://rafodize.rf.gd/bapolu.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/apple_app_store_button.pdfIn PDF document text

Related samples 8

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