Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac12d49400f1da7…

MALICIOUS

PDF

74.9 KB Created: 2021-07-22 12:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f40a79ca0d2b9e72f1c7d700e661e3e4 SHA-1: e73e686f3bf5f6bcfc0a621d7b0c5db1c09c9947 SHA-256: aac12d49400f1da77eec3755a4c70c5a1bd79a74376acd785d272997d217ae73
154 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware, exploiting the user's trust in document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5003

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://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/abc594ee1e61b137459cd7b47f2ddc3e/vezogegi.pdf In PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/tkjmk9nl13hdoofmdua9v9rdf7/rejoromamobizoxelolas.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/bda9e80b287aafa08a2eabad9f026109/25678279814.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/36170741836.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/27704d5ce84858e76c46a12b875922b5/xugunibonoz.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/64169649223.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6352f829c2fa44071e8ec39a3db68176/99078429241.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b69f8f0484ba6a89e0742bb376ce4839/virojad.pdfIn PDF document text
    • http://teplospectr.ru/images/files/dakas.pdfIn PDF document text
    • http://slsnn.ru/content/file/93112262762.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9da927ed1---gaduvije.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/bodorovixivoxaxegatin.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/ronojinemuxo.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/zoxosagobufupodufux.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608648419c312---dazupug.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/96157734374.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/vosidemig.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/70824951a2a6c57e3c72da8d6df0c9cd/sineloxixadewolimobulo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/gviqsss51g83umcds5gkm71n31/88932586379.pdfIn PDF document text
    • http://laatjehuisweerstralen.nl/upload/file/mibenezi.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/5i0d849tboaa5pvgfj37ieu49o/43944492657.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/78556268347.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/nelifiboxajegura.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab62978d6---rudimivikokumuxabesoke.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/xirawulesirorutenuvowim.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/bewupuloforazifajeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fast+and+furious+f9PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10313 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1