Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f657f09da1afd8…

MALICIOUS

PDF

62.5 KB Created: 2021-08-18 15:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ffb30e28c0fff1c40e4210e5e5551c07 SHA-1: 5e8125c3be82d3a68f34bac4185e14be988a0eb6 SHA-256: 16f657f09da1afd857ccdd1e4e90a49ea20d8bcdc869c7ef6cb79aaf36e61cce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7689

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 http://vom-ragnaroek.de/uploads/file/65500983733.pdf In PDF document text
    • https://baatco.com/ckfinder/userfiles/files/diwidumafe.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/d64facc2e70184c8ee0086528dfeca60/16865757243.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/zivogakezagaxekexokijoni.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ncu68vgf5rtiljfp5dv86qcqth/16030298059.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/rojelup.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/vojub.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607addacd03fb---23799567437.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2nbc0rav6vl6m1pp6nlf6c334c/7850459663.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a493268d96---daxufer.pdfIn PDF document text
    • https://ka-base.no/images_content/file/pedenomovadur.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/gelukubizapenumid.pdfIn PDF document text
    • http://dzbnf.com/upload/file///89015484331.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/55306864869.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/97435902144.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92623048b---zofafetapewut.pdfIn PDF document text
    • http://chinalabware.net/d/files/85684918236.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/42542735450.pdfIn PDF document text
    • http://chongros.com/userData/board/file/71474933163.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/xofirodofogin.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da4a652a769---tavapofofiwapuzikanixaduk.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/95b4ab534dd36b84dce7fc799f9101e3/17816343476.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/pudumaxadaleb.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/80822508233.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/zazujatovasidefim.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/tafovakura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=descargar+minecraft+para+windows+7+gratis+sin+virusPDF link annotation

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