Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f7d201d7efc16e…

MALICIOUS

PDF

100.1 KB Created: 2021-09-12 06:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 840a91681efbf08293e4d99e4ff33669 SHA-1: f6f623bb4e5c2d0558c4c01d85bfeefaef4d1b64 SHA-256: 38f7d201d7efc16e91b6fd30d94e887411355efcf62b96a2e5cb878af559ae4e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also hosts a large number of external URLs, many of which appear to be part of a link farm, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5847

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=twrp+flash+rom PDF link annotation
    • http://emploi.nat.tn/ckeditor/ckfinder/userfiles/files/wixil.pdfIn PDF document text
    • https://orrizon.ru/images/file/vekerigopexu.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/rupamobaxezowe.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/85789211127.pdfIn PDF document text
    • http://njchemland.com/upload/files/tuvejovazokamumopem.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/ruvalururedul.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/vedavebebu.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/mekawagajasuxite.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c54ff5fab4---tejesufanenawetadatoxolal.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/feluzukajibikolufete.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/pinilozozorinag.pdfIn PDF document text
    • http://egitara.com/upfiles/files/58074383568.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/27105046855.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/32065100804.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/81582475941.pdfIn PDF document text
    • http://chemicalengineers.ie/images/9249347556.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/79006751666.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/28887795913.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/59197901068.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/riwaza.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/bumepa.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/21c1aa47c03a5796a1329aca76c223f8/robebazo.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/zisajuroxapegopibela.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_off00017544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17544 10244 bytes
SHA-256: 89933b6891af9050ad0f988aa88b8dc871ad7fada6b1320d04082cf78fabe2e3

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