Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc69df8aa577d27…

MALICIOUS

PDF

78.6 KB Created: 2021-09-17 13:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3e1772d8ce23d8092e5fd3eb7c8ec60e SHA-1: 5e94076079a358e40de52b3a2a3f6e1145e33863 SHA-256: ccc69df8aa577d271263e3af1fb7db3b0af7b29cbc25dfac000b5884874b617f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or SEO abuse tactic. The primary purpose appears to be directing users to a network of sites, likely to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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 https://0900107678.com/upload/file/lisepabifuputanizo.pdf In PDF document text
    • http://goodmax.ru/i/files/10638368279.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/xakowaj.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/98473573511.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/87792910522.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/7699301844.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/84123713473.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/girabalefunadofizilekeniw.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021090512561173499.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/metazadefirupimolelajurul.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/90220615659.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137278f204de---zuwewudufexera.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/wasezunebazorutosapi.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/dibimilopezelitu.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/33743470933.pdfIn PDF document text
    • https://cityface.cz/res/file/71679664023.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/biluvupixabinafiso.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6d9388dfc---vimave.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/begako.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/vajuronas.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/wesawu.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/66655699373.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/76788241652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=metodo+analitico+contabilidad+ejercicios+resueltos+pdfPDF 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_off0000c906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 10976 bytes
SHA-256: 6844301de3bd07da3bd40e6d9607c24c43f29da82642d1223536c88cfadaa10f
font_02_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 19608 bytes
SHA-256: 2fa7381e5ad06cb438ccfc55f77f700a0efd5b4d424ef62f5cc9878eef070888

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