Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abd75ff016fa5ba…

MALICIOUS

PDF

97.1 KB Created: 2021-09-04 01:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b5f408385806c532c3e1c85514d0e828 SHA-1: 169ac2a95b55229b6453fb5122404cc1dd690aa4 SHA-256: 4abd75ff016fa5ba35ebc42da845637363f92f99b3fe0ac0913a8c51356c08a3
94 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to leverage these sites for malicious purposes, such as phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8252

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 https://coretry.ru/uplcv?utm_term=back+on+the+chain+gang+tab+pdf PDF link annotation
    • http://angelofthewinds.org/ckfinder/userfiles/files/xutubegagulujubowaba.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/84us5fvjjikjt106tpi0cmltek/52008984602.pdfIn PDF document text
    • https://alev.az/userfiles/file/jijolopejurumekezemegu.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/lumelorilep.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608687d8290ac---92543564985.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/46904505572.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/460d7cb1d1c84c7d16f1ff602c846497/88134533559.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d79561a58be31b2e861d4c799caee2a0/zogexigezamabajuj.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16105b5df68c9c---26046043312.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/86311190593.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/bolavoveg.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/lejatimepaxol.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/7f4cc8eaa2a74744e8811d3583feaa60/xogezazaxut.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/sexexebimetifew.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9831a696db---gulurofexifi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98bf578185---wibexukuvafebonu.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/kovatanedomunavomi.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/xisaped.pdfIn PDF document text
    • http://mousike.it/img_ins/files/51133462102.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10e2f1bb12---sasalalewebako.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/bifagidixosogedaban.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/jepalabarogipiw.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecb44d3f04---wipuxefuwepof.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/49402028496.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/84312267074.pdfIn PDF document text

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