Malicious PDF — malware analysis report

Static analysis result for SHA-256 b936627a5b636520…

MALICIOUS

PDF

60.9 KB Created: 2021-09-09 18:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0924d8ab1616b649b2dd4695ea4a3a36 SHA-1: e1879e192a564a118dbe82ed79d16facdc55e4fd SHA-256: b936627a5b63652037013c257ab3d50d3a5160b7cce9c05166583624c2b5843b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of hosting malicious content or phishing lures on potentially compromised or low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6616

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://smidgel.ru/uplcv?utm_term=h96+max+x3+amlogic+s905x3+review PDF link annotation
    • http://malifer.hu/upload/file/kilage.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/jepunozazulodu.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/48300607609.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/lubamulowodirug.pdfIn PDF document text
    • https://viceda.com/userfiles/file/67635693695.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/raxoda.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/10003070455.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/14809408683.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/83391989711.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/75893494107.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b73ef1bf2---41551214212.pdfIn PDF document text
    • https://asiapharma.la/files/files/nujonewi.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/wezitowejupozureponuz.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/18571166280.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/36929533619.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/80314201257.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/39m09q2tose7l3i2q2bh43clcc/fugologukebep.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/moduparifaweju.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/ce0f3b24950110b5c106bf3882baf3ea/30660877663.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/kumijowikuber.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nvbecrb1i11mjdrqmjg24luio6/70317689871.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1376c3861---buzoxepokimo.pdfIn PDF document text

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