Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ed6eb9b5ace831…

MALICIOUS

PDF

72.4 KB Created: 2021-09-13 21:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d29ea63ad280c9c658ecb4aacea7c84 SHA-1: 2a08313134862d60743963bdb72e8a568e99f1eb SHA-256: 42ed6eb9b5ace8318644a3a8b06a2ea74d2f17b6bb9762b84ade697dee64f0a2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within the document's structure and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. While no scripts were explicitly extracted, the presence of external links and the overall structure point towards an attempt to redirect users to malicious sites, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

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://archism.ru/uplcv?utm_term=henry+stickmin+download+android PDF link annotation
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/36230444475.pdfIn PDF document text
    • http://hflchw.com/upload/file/damuvapaxoro.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/76906496470.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/mamakafiba.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613b698c21525---deketoru.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/39233147790.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/36845880654.pdfIn PDF document text
    • http://sun-tes.ru/files/file/2419758649.pdfIn PDF document text
    • http://origo.ws/userfiles/file/jawegegisevoj.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/82219055607.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/18374888821.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/sopupepawijivubuge.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/70113777064.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/63196568276.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/lifevogexugigimabumuru.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/47225380905.pdfIn PDF document text
    • http://uco-kampen.com/media/files/galewibomejet.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/82175867104.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/39436221135.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/33783116975.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/60335118890.pdfIn PDF document text
    • https://parc-hotel.info/file/7882819048.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/4165710819.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/gowipotamozanasodo.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/78d58cf74c3fe34dd9c265abee058488/wilajipe.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132ad4508a16---7789467299.pdfIn 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_off0000d5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C2 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000ddb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB9 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_02_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10816 bytes
SHA-256: 8742d86e0510e5b5694c156c343dce43dc99f5c24572da5cd0a691ec884889a8

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