Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0586b3edbadd71…

MALICIOUS

PDF

78.1 KB Created: 2021-08-15 13:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ad93285c42a0a6310dc5c1f1d77eb781 SHA-1: dd13d02a1c63fc472fd8f01e0d13bddb99671783 SHA-256: da0586b3edbadd71ed9d8c4a27c959730ac4f77aabd904e7c1f8944eaf7ebe0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential redirection or download capabilities, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9159

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://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/599d33f45137bd184afa08380fd0b55f/60358345961.pdf In PDF document text
    • https://detector-billetes.com/Imagenes/file/94071774444.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d6cfc2f64---93391663061.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/senajozu.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/91604214631.pdfIn PDF document text
    • http://inistor.com/ufiles/files/48972264464.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/87245652858.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/dotenonimowaxoxaxetanar.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f56425602c---jirowaredexamigip.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/sedenajudutaxuxus.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/12um18jvmjcoaiv8akpuaabem4/tatijanoxulel.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/moxarubizefuzaxagizemo.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/wagazutagejetowagi.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed743d048---waforuposotara.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091dff811fc9---tanujunezezolo.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/16714027220.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afde4f6cc23---38687617195.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/nanakomo.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/36669482993.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/85343309192.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/297432801.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/madabawowunorasufokazo.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/satifikaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=speakout+pre+intermediate+pdf+chomikujPDF link annotation

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