Malicious PDF — malware analysis report

Static analysis result for SHA-256 24701ee40efbbfea…

MALICIOUS

PDF

98.5 KB Created: 2021-09-06 23:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 536e706825e28f8fe1085fe3942faaf7 SHA-1: d8eb6cd2328c14f9405e200600fe6c8eca919114 SHA-256: 24701ee40efbbfeaf16d6b8231d89a2c5456743d1deb8dab4032cb330759f800
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the 'link farm' heuristic indicate a strong likelihood of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

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
font_01_sfnt_off00014ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE8 10960 bytes
SHA-256: f109399c28d69b471837f60a406328c1e251d9da1dcbd854a61fe7de8fe4f5d9
font_02_sfnt_off0001641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1641F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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