Malicious PDF — malware analysis report

Static analysis result for SHA-256 8634e61d5c82a74d…

MALICIOUS

PDF

52.6 KB Created: 2021-09-04 17:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8b0418e47cbf57846f3b6c586069bc73 SHA-1: b4b64c644914520cd2c20f5a31125ba6aba11be8 SHA-256: 8634e61d5c82a74d54ac4d7a2f16d3304334d3962ca7cc366d5a0fcb3df1f0c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits vulnerabilities or contains malicious content. The file functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, suggesting an attempt to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6586

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://hzjksj.com/images/upload/File/saberuwi.pdf In PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/toxexakamububufizidajiju.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16074f820c03da---98670297790.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/lazarakebitavarusile.pdfIn PDF document text
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/fetawudesisineba.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/950f8270341bf239b4cae4d4fcdc254a/42767437447.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gvdlvc81lhtnlhdvt4g0sjjlml/43970829213.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160781c8193949---90485061694.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7e9e36854c3249e40a5cff005048b200/lobipudapemoxifovakara.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609609f5ef1cd---99934204108.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/46d5eef483c7b049eaa86a5523264e2b/2015152684.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16085835b7ea93---mupit.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/99191373655.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/14339178394.pdfIn PDF document text
    • http://kisito.com/userfiles/file/baluxerepu.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8133641a36---62330230414.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a7815a91d---75309101937.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/45082827308.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/85619671737.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/q0k3pb7tdjcq1f7odlqi9e3su7/pewexoweragivubenemo.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/jixukibofadolujazemaxidi.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30b8955842---dijedojupiloli.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/zirupusazevomobinumebige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ccnp+routing+and+switching+v2.0+pdfPDF link annotation

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