Malicious PDF — malware analysis report

Static analysis result for SHA-256 956071d3475e8a5b…

MALICIOUS

PDF

50.6 KB Created: 2021-02-10 02:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fe4d856d667b428ecca99b48ce737d03 SHA-1: f6542f21df98f75dfdc701d207bc5ad8a3a1c95f SHA-256: 956071d3475e8a5b2455891908286e20b7c10c2716be97371126aa5712f69ae2
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 file contains a large number of external links, many of which point to other PDF documents hosted on disposable domains or link farms. This behavior is indicative of SEO manipulation or a distribution mechanism for malicious content. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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://jottigo.ru/aws?utm_term=business+administration+textbooks+pdf PDF link annotation
    • http://copyright-services-us.com/154798877293s5ud.pdfIn PDF document text
    • https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/tuxekawibiki.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/vowepurenikurum.pdfIn PDF document text
    • http://brumbum2.xyz/flood_in_kerala_news_reporti00ua.pdfIn PDF document text
    • https://jotudopu.weebly.com/uploads/1/3/5/3/135316217/0ea9a3c7b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_60130c5cb5d4b.pdfIn PDF document text
    • http://bobiruropiles.22web.org/bruxelles_formation_rallye_des_langues.pdfIn PDF document text
    • http://figufesivinex.22web.org/bubujojewoxizi.pdfIn PDF document text
    • https://dovomarolod.weebly.com/uploads/1/3/0/9/130969455/xivovedok.pdfIn PDF document text
    • http://fullpisetc.ru/philosophy_for_dummies_free5zgb8.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/bovogadel_javej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fd66fa212e8c.pdfIn PDF document text
    • http://katermore.ru/hendricks_county_sheriff_police_reports2vf01.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/acrylic_sheet_materials_for_shower_walls.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/64066003208.pdfIn PDF document text
    • http://fejesaj.epizy.com/acide_chlorhydrique_formule_dveloppe.pdfIn PDF document text

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