Malicious PDF — malware analysis report

Static analysis result for SHA-256 9784ede0ef6b3d95…

MALICIOUS

PDF

48.0 KB Created: 2021-09-11 15:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 25475d44527cc5297d544ee661ad7da0 SHA-1: 58b46b55142a9f8e08362e0087ee63c0f07463e8 SHA-256: 9784ede0ef6b3d95859737a97352628cdb29ae1da8712f7afd4a26a59e2cc0d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, as indicated by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure of the PDF itself is designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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 http://lapempi.nl/ckfinder/userfiles/files/49856021874.pdf In PDF document text
    • http://jgweld18.com/UploadFile/file/20210910143456706.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/90794014539.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9e89854c7df97e7c4c5263e44f3f5a15/luvibuvebotusareru.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/demetawexev.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/86950180741.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3efb629c02c7336f8c45f5e568fb6451/54757863277.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///xopisowamorobulo.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/mififanirol.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/25094166347.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/32813789486.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/saxusoletosulira.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e743e7380---jokovokosomanegasidero.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109061559077867.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/badijulanulovamafiwiruxe.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/wovutakogufulabalos.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/67236941247.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/sokiwepuvupajujevewo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22f28ebd3---namuwagekuxowono.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/bepozak.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/59697517416.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/vexatokasamovo.pdfIn PDF document text
    • http://semanbio.com/upload/files/sibajovifananuxipuba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=lord+of+the+rings+trilogy+pdfPDF link annotation

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