Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e755d90c077fc7b…

MALICIOUS

PDF

43.2 KB Created: 2021-09-06 11:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 166127f8f966c0c2fcffc4d7de227c24 SHA-1: fe589b68b880a42e8b9d1ecbed1c0735b0bcc5cf SHA-256: 7e755d90c077fc7b211bd050812917fb05b7daa3f47d6dbcdce35db7a7e8301b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and appears to be junk data, not containing user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7716

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fibaquitaine.fr/cebatrama/userfiles/files/nepowa.pdf
    • https://tpk-m.ru/files/file/duxalalesotu.pdf
    • http://liavanhaeringen.nl/userfiles/files/kirisegudemik.pdf
    • http://www.miwon.com.vn/app/webroot/uploads/files/67883911895.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/bk5ogqhiet37vbjptdkvu63ob2/fakazowitewezowuto.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5ea23470cfcf13116cedc72537d0601f/19307114191.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608610ffe0e42---xolonogukazurawifugiruf.pdf
    • http://maurovalleferroarchitetto.eu/userfiles/files/14722285273.pdf
    • https://giorgiosantinelli.it/file/49697663990.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/hrqm0urseo4ulvg97ivtdv0im3/dewexo.pdf
    • http://project-lovcen.me/userfiles/file/murotupiw.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adba1cb69bb---2219087053.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/j3lgkbq68h9rv9dplffaaj4ekn/wusigutakarami.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c2ac4e34---wurufajokazo.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606def45b8bd1---96810487557.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/op4elgcjfauv413fsbkhqvia2b/55355363077.pdf
    • http://cuacuonductudong.com/upload/files/gegudeworuri.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9d0775a35f9ddcfdaf5d7cc6ce1dd14c/96912389029.pdf
    • https://promaxsuspension.com/csmimage/file/92462523409.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/161269515e71ac---2427699758.pdf
    • http://aucoindeshalles.com/menu/file/jipuvotofibinopagoxamo.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d4d71724a6f9eff7d0122a414c975307/dukepukolurepozegi.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/68262fb7f456a42c9c8bf38363e2182a/rudezozipurovudujumep.pdf
    • http://perfecthospital.org/ckfinder/userfiles/files/90655512801.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bubbles+drops+and+particles+in+non-newtonian+fluids+pdf

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