Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f5e809268c2d0d…

MALICIOUS

PDF

87.1 KB Created: 2021-09-03 15:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: aa681ccc36be2c603d00f1a155387c76 SHA-1: 0ccb6da4706bfa0bc23a8c68d279cb71e694fbcf SHA-256: 06f5e809268c2d0d62b970d8f48117f45108f62e781ca1a60aab9c3fed67c87f
156 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 0.9974

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://allytemp.ru/uplcv?utm_term=daughter+of+invention+short+story+pdf PDF link annotation
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/73656800603.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/35058743927.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/17115288591.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/32f4aa5b12e174a09d51306593b3091e/topimiperifivaxabijoxedo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2ou15eg6mqgppi60a95039vghs/87857245459.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/gabag.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6b214a26---36677535170.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/13685009860.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7339c955c4---najeletusudodogu.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/77697131697.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/zuloxedidufapa.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/fe241bf5eff0e3deee13ad3f62759d87/74893723759.pdfIn PDF document text
    • https://cubic.is/userfiles/file/pixik.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/e5c6355a23d3bae19599f7053fc19aa9/junijikura.pdfIn PDF document text
    • http://gerocuki.hu/user/file/81146680856.pdfIn PDF document text
    • http://abwva.com/uploads/files/sevimofomibojakiz.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/vetaki.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/tizeriguwujobuse.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/9083535921.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/15626046110.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609916b1607c8---jatetexunugifewusul.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/dopovoxojopakitibijipakiz.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076655892d8e---fugumarosilirevi.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/sodezog.pdfIn PDF document text
    • http://01host.ru/userfiles/files/dogutujafaxosidogitalen.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_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 11012 bytes
SHA-256: d20874f2a213f1e37e2fa6f0cc0e89ebc22c020b69557b8a3c059f1bda2b3a25
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 18028 bytes
SHA-256: d7c8d513e20db6926ddea8010c9f2c1e12edc4b480f54a92b99c6aca0379835d
font_02_sfnt_off00013638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13638 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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