Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e831c4e3349a4c…

MALICIOUS

PDF

63.7 KB Created: 2021-08-09 07:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13b83d73018dc22b5c32afaa78c0b51e SHA-1: ef25b7b36743203b5e3eeb8b65fed61b92d067a6 SHA-256: 88e831c4e3349a4c4b5e4f96f0d507faaa29bf2560390c5bfaeb45d3c0fa275b
94 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple distinct hosts, many of which appear to be compromised WordPress upload directories. The ML classifier also flagged this PDF as malicious. The primary goal appears to be directing users to potentially malicious content through a series of indirect links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6239

Heuristics 4

  • 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 http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5b7b26886---duziviwosuvopewe.pdf In PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/164prc1eb4i58bldqtshdspd2f/84706922777.pdfIn PDF document text
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/48352586872.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab6c1f33d---tupabi.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/tipibiritudaji.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/zevutakixesagozalage.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1ammrkavo86g702po5nekm9mn1/47045681613.pdfIn PDF document text
    • http://tochalco.com/uploads/files/pogivizurovosaf.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965da6a0532---14844337977.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aafa94a32f4---jusejeli.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/kuludefopunimow.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f1dacb738199950f9e9166701b1648a8/kifozuroxikefumijefubaj.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/p9h1anv0l0m7cvkjaa6pu9ciko/4774430766.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/j4q02irqrfkfm0pdvsq6ntifk7/16581802285.pdfIn PDF document text
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/zoronixexotagarijetimij.pdfIn PDF document text
    • http://land89.com/ckupload/files/miduwuwebizobomudugajofo.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/17431402941.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/3661c39f21793db4972e282fc8ca2156/68359520516.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece570363---dizabani.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610546dbd42de---ramimifi.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/b6199mc7v1257ekph429g0f6bk/22473995965.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/7547745908.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/42276497178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=t%C3%BCrk+islam+edebiyat%C4%B1+%C3%A7%C4%B1km%C4%B1%C5%9F+sorularPDF link annotation

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