Malicious PDF — malware analysis report

Static analysis result for SHA-256 93891853664258f1…

MALICIOUS

PDF

54.0 KB Created: 2021-07-03 11:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9a17610c58cd14b46e29e6c51f20e340 SHA-1: 2bf78b804d114a0a8d36fd55abcb73d1397d3ff9 SHA-256: 93891853664258f1ba2f3f2842db7c39e3f40c2c858d91b1250e4fc6a0b3984b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure itself is minimal, indicating it serves primarily as a vehicle to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4953

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://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a04a6071e3---81621758731.pdf In PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/0a0de5673c004fd5e72c6a486a110888/mekaxipolibativir.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2aa7e709a---rutunipulipevarelimijefu.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/8982585604.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/a6rgrpfug87aocks1d0o2j865k/wejajefaxogipa.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/flkbpu7m1ut7of0q3d3kkk4qg7/68881167020.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607665cf8294b---64011196237.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/f35e443255e4947d93a42ead6be2b467/vinepujowugizisomejewor.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607936518f39d---40588747669.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5vtk19e6llic9cjccv18gcp6g4/gupigupesitasutejiro.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/muradogeluxasavixawege.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c632bf60---kuruxuzenepakivusoxe.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/c139fb30d0275424ce951a7f6d5af590/58110566961.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607b74f53e2fe---xotorupobepalipubidewab.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073309b60dd8---73255592477.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-10/20210610054346885275.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/97873530128.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///zurimopebedilurusaveteluf.pdfIn PDF document text
    • http://zae.me/datafiles/file/fuvosijojiritodu.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b2460f9f56719cfb976dccb9e9ad799c/42802853240.pdfIn PDF document text
    • https://faprosid.com/file/1868937346.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a9b36e60a---xurezexedoju.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/kaoe1th75fnik4f8vteqld6g6p/veram.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=nietzsche+and+the+vicious+circle+pdfPDF link annotation

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