Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a00140e22339ef5…

MALICIOUS

PDF

61.8 KB Created: 2021-09-02 04:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 78a85424a4563c69a42479e53993cde7 SHA-1: 8488c802013c008387bde6f7e738e889d7ef7cd2 SHA-256: 7a00140e22339ef5565010acf497cc4180eb9a79e56ced51e3615a188c39a73f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9608

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://beruanglucu.com/contents//files/kujuxugiwenane.pdf In PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/89864796153.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/61501105565.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b00653ba7f6---wiriligoxuvulet.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/37120663149.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a923548f82---46766939486.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/daxewukemulo.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/41959839081.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160803ce8e76b9---fomupizekopekazewazex.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/37093314050.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/nutelopimides.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/ruwujifurulasonifiwaromo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/c52c247325069e865611954ccec91533/toxatajulajixefod.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/42999567121.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/9b7349b7ac0ade9257e8e0308e68f611/pilizadokexukefigelevebad.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210511223952.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1d505046---tiguzudumanesomi.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/voxenixadowizu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/wiguvosojep.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/89a66r70ic4e65e73f8il1rbfv/ruteruwixabifolugogajeza.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/42403601066.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/8fnikh9rhj54q5vqrqvoqq35mm/65375631457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=standoff+2+download+on+pcPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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