Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3681c1346a57e7…

MALICIOUS

PDF

67.3 KB Created: 2021-08-10 00:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0965472d4acca1ccb3bce3f8c581a49d SHA-1: 915002df13384cfd9dae4aefea30a41c5811f7a7 SHA-256: df3681c1346a57e767137c5d6c34eac75c10cb9dd756496175d8f55b8805601d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

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://huntic.ru/uplcv?utm_term=fabula+original+a+cigarra+e+a+formiga PDF link annotation
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb2e3caf54d4e5e4d374ff8f60998a27/nozorawosika.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2957b194ef---53963463542.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/lesozevire.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/2221213930c2eb37218b5d620daf20f5/7105715322.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4082b5115de56fde93fc36d92eb1ebc6/nukaso.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7ddcf44671593258ae44c112a1f882f3/fexovufigolewo.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/zuvagopawunenumapotodoko.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/86570557805.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/9d75fkv314jkquem2r9bdhtjeu/97498099569.pdfIn PDF document text
    • http://iwort.de/userfiles/file/rifevo.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a064b8dc4d3---11877159400.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160947f6e50001---90484276326.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/882d7e5ca35d2a681828bbf8d9360021/sopatutudukinenexofin.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/nanawilerow.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/kesowabikivolotoxuzix.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/59119cdd8bb79e9fa9faf9d9dbe192f2/xisoseveteduj.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/6648458157.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45d0763e76---rixevep.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/a378mnr3f125ovjc4n86i7mvh5/29096948130.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/43885088792.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/gekufupaditikuf.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/18141756809.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/64738779128.pdfIn PDF document text

Related samples 8

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