Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9c73bd49e7dacb…

MALICIOUS

PDF

89.6 KB Created: 2021-07-14 02:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ca55114a1aa6943aa60b1dda8a4c2567 SHA-1: 979d5dd78e0f8e1afb12fefb85d15eda0e76e6e3 SHA-256: 7d9c73bd49e7dacb70b6da52435bda0f1519a6f9205c8a17777b7b235a6fb6cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely as part of a phishing campaign or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=what+are+the+energy+transfers+in+a+battery+torch PDF link annotation
    • http://animationcoach.com/userfiles/file/tozuwusakokixup.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/6d81326dd62a901cfa3cc74a83d04dd0/gunowelabifiregi.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/510034036.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/nafuj.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051822115173499.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/a5913db5829d9b9a2eddc0ecf26c69f1/39453780335.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6a8bd289---57203733322.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21215339ae---kadab.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/ce1f8e31ab7b5f39751ba60307fa8b0c/fikemeguga.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607974fdc4ba9---20533693858.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3069f52d46---47281657291.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/89552027723.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/zemudadujo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07aabac8ad---36688714780.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ilshvtshbo40lh3tethq04kdfu/dubosajajeginejaw.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/xagor.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/af9c059fdbac072f8b0fd2d5de41fe87/xenuwoparatewexa.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e66feedb6196577bd1ea341ff6b3f93e/dokulugewubapuwofedami.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/lefovoruwagav.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/vobafu.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/17838060958.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/56608872991.pdfIn PDF document text
    • http://alteanetworks.fr/img/file/jomobuv.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/6h03gibhu0sc3uabvi2rpdrigr/59566896350.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16091ee3674440---nabojufonezijesafuzo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 10816 bytes
SHA-256: 7ac66c6fe992a6a5d73c5c9bbc2d6f3af468c5fd902f3b319dd607cacb36c94f
font_02_sfnt_off00012d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5B 16684 bytes
SHA-256: 13de53652175a22bf4a07c5db41400abe493e780164a869f41cf64605f2de9e6

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