Malicious PDF — malware analysis report

Static analysis result for SHA-256 079f72e928e25cfb…

MALICIOUS

PDF

63.7 KB Created: 2021-09-19 16:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: da0daf9269f3962e1a93254b2f6e4f28 SHA-1: 8d462a9e761d0a5f347b90164a68883c45ce97ee SHA-256: 079f72e928e25cfb2c4d729a807196b996391302e4fc1f3594d7965d7ae8421b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, including one pointing to 'nomylo.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links indicate it's designed to lure users to external sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

Heuristics 4

  • 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
  • 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://nomylo.ru/uplcv?utm_term=korala+maan+new+song PDF link annotation
    • http://stefanourso.com/public/userfiles/file/37145990094.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/soviwu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/126368633ef86a5494906d2f2ea66975/38944603171.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/30330458283.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/zaxugoxezapuwelakibug.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161303f1027383---54743984691.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/lexunep.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/60266027287.pdfIn PDF document text
    • http://tieuhocsondong.hoaiduc.edu.vn/ckfinder/userfiles/files/54084675710.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/zejawomaxemumitip.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/89867883665.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/163108851267149789316.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/58134447592.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/zuminuvojaregewela.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/36113163760.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-14/20210914061523445730.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/gosipegu.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/83516423279.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/futira.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/tusun.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/wivopemubizeboduju.pdfIn PDF document text
    • http://prosquash.by/data/62985720572.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/fizafunusatupagejorok.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_off0000ca31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA31 10336 bytes
SHA-256: c87d69aa35839eda861b9555590f561445e0841444fd1269d82fb0295892e334

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