Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac80714b289e1225…

MALICIOUS

PDF

51.2 KB Created: 2021-09-22 15:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6f28df22ec1d200825d8b0c29e7408cc SHA-1: 4820c516cb89eaec5884e8d75dd5df033091046e SHA-256: ac80714b289e122582b62cf5528a4b4bb59313b6969e61c414acc58a215679aa
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The document's structure and embedded URLs suggest it's designed to lure users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7069

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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161364d2e170a9---73568711637.pdf In PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/mifidubolelid.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/tevavujevasadaruvejijipav.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/rulenaxaxuwufigapo.pdfIn PDF document text
    • https://theipbuzz.com/images/file/17817118403.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/mikisanozamiziregoguramaz.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/vuwivivifisumakobizitax.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/ponazep.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/tunudinoravedenasosavotef.pdfIn PDF document text
    • https://korankertas.com/contents/files/tuvodup.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xevawosutajom.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/99330825853.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/92115155470.pdfIn PDF document text
    • https://alertsecurity.in/ckfinder/userfiles/files/jigumigimuwefaso.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/8299508966.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2db847b349d25673591da56739b2d90e/95727729907.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/87981916624.pdfIn PDF document text
    • http://seritour.com/rsm/files/7029492376.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614080afa98d0---6988811721.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fidkg3ss6c5dn6khk7tkna7r5b/49696946071.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/rikowifajugofagivugo.pdfIn PDF document text
    • http://korytnica.net/data/files/33678148347.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/wasejalosogopegixegarov.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/14226331181.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/gividipiwunakoj.pdfIn PDF document text
    • http://dytac.hk/userfiles/78237528774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=csr2+update+3.1PDF link annotation

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