Malicious PDF — malware analysis report

Static analysis result for SHA-256 6175bf2fba8b72b1…

MALICIOUS

PDF

82.9 KB Created: 2021-06-24 23:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ceb6c46fad113ffa54cf814a79121863 SHA-1: 608a9b92445d46c3cc7660b08099b4334416bd4a SHA-256: 6175bf2fba8b72b17f67f4087ffe105dca66f63c586c4e8c46e168fb96056361
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest the PDF is intended to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9728

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=franklin+and+tracey+gta+5 PDF link annotation
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/libusezisafetagutepudipuw.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ucn98c2oghcu9lusj71mru7cv1/xituw.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/49600505557.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/6fc4306bb9ee67f561f72faae9f0a1f8/buzuribaregeba.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a34d89ea035---33673153328.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160905bbf44773---rapabumipitopekagef.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/tpgm1u50lv4v1r1kvmbihem4t4/63152315192.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab4a351f3b---pulififabaxuma.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/sifuxesupatabojifirize.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2d5c73efa---47368512831.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/27077024474.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3e52d5535---rovelebajunabidadurene.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/suwufadudibinewetimokatoz.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/tipexuvobogaf.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0a67a487---taliwatogidutanuxajerivu.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071a67627ce6---zelunolufupuvedinaretut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/14330566033.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 5172 bytes
SHA-256: b5c0efdfde049729e4b76f4c8ab23619a73d7803ed14aad260061ffbe1f16f34

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