Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1e815ffdb91b3e…

MALICIOUS

PDF

69.2 KB Created: 2021-07-07 17:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1ec9ab2326b3259839c3cefc68c104b SHA-1: e4af1435d0c52460bb12b30da6db87fe593c0b69 SHA-256: 8d1e815ffdb91b3e4e3257e332562f3d11d8d1c453b61a4a638977348abf6732
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to distribute further malicious content. The presence of multiple PDF link farm heuristics and the compromised CMS upload link firing strongly suggest this document's purpose is to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aduanaldelvalle.com/userfiles/file/rarul.pdf In PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/bokaboxudiletibidisufafep.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d87c292d176---kukuxenamaxugalovami.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b045e68404---buterabodexetu.pdfIn PDF document text
    • http://teplospectr.ru/images/files/50901406081.pdfIn PDF document text
    • https://ebooksweb.net/files/file/49422639718.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/bisujizubonarofirob.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/ruroxibironijo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c38f4684d---nokemametelifo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e8ae7ff1---91251863508.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/q2ve0k57v6vqdk8didsgj5u0r1/73954598527.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/jaxadivapopoguzeni.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/gukak.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/jejuxefi.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/ganumezazopelazadeze.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/cd59753611dbe443066014c0d1a55851/safenasupilojedem.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/bivesa.pdfIn PDF document text
    • http://519pf.com/userfiles/files/nupimodobixipamolegaw.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/ropizilakodivepogo.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab23a8b2620---nevuxoxejov.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ccdd403a3af8e928fd949a2de8b799c/93975992345.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30141091817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+sell+oppressor+in+gta+5PDF link annotation

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