Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f98950892f990fb…

MALICIOUS

PDF

86.1 KB Created: 2021-09-06 23:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e36a873bfa54e0d22551be06fd3fb0bc SHA-1: 11bb8fc8a3c961ea20d52d8e374dfe995b5475f8 SHA-256: 8f98950892f990fb533dc013aab36c8cffdd4fec2566c291b99e2bc0376dc0be
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised or disposable hosting. These links are likely intended to lure users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4503

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://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/85463544570.pdf In PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/41587293594.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160752c604a3f9---mudawul.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8aad612e3---miletidowigububobodegabu.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/41760022790.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/05d7a5d1bf8e4f729b37d4a8002ecf32/dopotajovunu.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/metujubogukawajenoro.pdfIn PDF document text
    • https://renault-service.com/userfiles/bexizabitoxusatix.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ae65dafc8---13155482227.pdfIn PDF document text
    • https://emprenderem.cl/files/lusolodofotisebowen.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97556592c47b8f35cd04c7cbafb5fe29/19918432953.pdfIn PDF document text
    • http://araonline.hu/uploads/file/56176529380.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/6b67bbf38c566e162bf174eb52a14422/55222032877.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/6814977215.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/1460615055.pdfIn PDF document text
    • http://dalaichau.com/files/46090869418.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/kobomagefosudu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/sabomilekeboroledopu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca08af62a---fimobe.pdfIn PDF document text
    • http://timesofbangla.com/uploads/files/rudabokasonuzupirakose.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/f3912440029b0d02df4e2e3b429150a4/xepefutenorugejirojo.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/viludipoko.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4acd13a6e8994cbdcbabaf076d32ccf3/xodisenojilufi.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/64294915409.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a01b908b---30891362881.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/jovonixopatosobasada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nordson+efd+pico+touch+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001155c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155C 21088 bytes
SHA-256: 98efc866572a3077015eddac3d8af82269cf810a1e7b9c5e33588c60f3b5f77f

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