Malicious PDF — malware analysis report

Static analysis result for SHA-256 db584728a0863415…

MALICIOUS

PDF

72.8 KB Created: 2021-07-30 21:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e222b9ec75808a4f48380d6b8bf0dfd3 SHA-1: 60d630dd426bd8427fc3f643e9907854c92e39f9 SHA-256: db584728a0863415136695b50c96d506ec976f7711d55288e2fb19c6aaacb4d3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to distribute malicious files. The presence of these links indicates an attempt to trick users into downloading further malware, likely through a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4593

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://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/23f8ce4c010d3e3c87cb4b0afd3d5aac/71106690807.pdf In PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160d1862bdcf12---81332559427.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/dbaf0fd9b781e26caa3428018bfa97f7/vebosibevujufanofal.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/5mvcj99qgottj0lpfa2qvp35qp/50883816549.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/xexupowukosedalafabuwe.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607211d68263c---48421262911.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee1339ec85---bipanebokomerut.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/6445536054.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/095888001af53351e6599cf0090a0b2f/6847397292.pdfIn PDF document text
    • http://sbkf.org/files/files/gowosuwujafamugupofif.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/54562840436.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ef6be53ce---sasavobodovutikiliv.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/b7e64fb4746af3b698b53e3793312f9e/17220240580.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/28430647778.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/12489241176.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/zibawudirozegosadozisirev.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/lisolilugej.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8700213587---61310514708.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608db8b6d95b0---53847692132.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/bezazafiwonajanunuzibum.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/69840866051.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/649b1f71efe897bb570b666931a3d837/32670547954.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/941f1c3f12ad53aa62fb7c9c4c0afdf9/funerupadukak.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9f2a62f17f02fcd109b8c1d696a3cb3e/riramaxinegalipipewu.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/19d2712a483e46f958c34a8a03074572/68195479432.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b50e3504f---nikuxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=assassin%27s+creed+identity+game+download+uptodownPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 16836 bytes
SHA-256: 6e637c089621ebdc432625b2905a01695098ec04ff0dfe3f90bc825b8c4ff12c