Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e05638f28a5901d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 00:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbee53bf1414c2e4e38e2a031a131d64 SHA-1: 1f323c85fc8cac33d50dc27fe911b99b4ad819f8 SHA-256: 6e05638f28a5901dc11645d1fb91f08e7d4b80090703f8c82e491ca912165913
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, many of which appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://philabc.ru/uplcv?utm_term=bad+hair+full+movie+free PDF link annotation
    • https://petikdaun.com/contents/files/28238578559.pdfIn PDF document text
    • http://brenderup.ro/mm/file/vejopurawaxuzefalogelorip.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/41029564914.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/44657767524.pdfIn PDF document text
    • http://scro.ru/pic/file/65463470885.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/jovipivilejexitijabaniso.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/72121643273.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/ludijen.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/65607773541.pdfIn PDF document text
    • http://pbpharm.com/upload/files/moxasazedesiwi.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/66960901835.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/66458918657.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/25380248660.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/98299021823.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/fiwipedenumodavurobimug.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/vefarawalukebutomifedom.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/kewagimurilunegonaxopekaf.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/57516937703.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/85294825170.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a898a59f5b500002f04dcd9ab51ea993/zapimazuz.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/jekerolemasadejagomi.pdfIn PDF document text
    • http://juncheng.tw/upload/files/jibomogegaretubewejin.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/66862699106.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/teboxawuniresutati.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5c76b110a1e36c6f79bcfc7e3d4531b9/nupamumuv.pdfIn PDF document text
    • 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_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 19632 bytes
SHA-256: 15a2139acbab185cf0deb6c24de06afbe7aeab9f33a1a38bbe60b07b304c3338

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