Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f9c5761ed8d196…

MALICIOUS

PDF

90.3 KB Created: 2021-08-15 11:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1af0433a1dae4a065fc7d66ae0c9d49a SHA-1: 3a2b58d2d05c92a8290a94ecafc6c6c0a36a6636 SHA-256: b9f9c5761ed8d19687ce849b91ff6783120248a0babcb6a044a967daf6417f65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://shosholoza.de/file/67944434726.pdf In PDF document text
    • http://hoinhikhoavn.com/img/files/gixasozuwafugov.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/7452369065.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/90e7694d75184684f812a94e7744e89b/47445256238.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/riwekezeg.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a13b9092d9ceb7a7238e39ec9fe83152/67839086849.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/sitikutaxatus.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/57e65f2f2a397f076f2bb39872823094/13269139937.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/fba67ecce54a2c2a941de43a1aedf7b5/xiper.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0fe5e3f81827d75b91a3481c28a24095/lipirepapinusapedosup.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/kamaxul.pdfIn PDF document text
    • http://mcleod-bobbitt.com/clients/64742/File/megolerikujitulemog.pdfIn PDF document text
    • https://stopserv.ru/files/file/zanovuwidawixufubotez.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb7b0a9fa1---vixukone.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210718022654.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/610c6f7e59d1794dd0ad97b430cc552c/20680248679.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f6423dd95---junurexibogepu.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087153138246---wijamiwim.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2m6ras4p36kkanqc9shcb05873/tarivedufotepuru.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160feab7ab5a02---jejanuzarefoxule.pdfIn PDF document text
    • http://maihome.hu/admin1/file/pifabexijibifatuti.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/devipilenevub.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/85833139055.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/8ff1148f76141f091f1b002c96ecac20/83648963996.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/vesuvel.pdfIn PDF document text
    • https://priscar.com/documents/files/pevitowugixevan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=administracion+de+empresas+libros+pdf+gratisPDF link annotation
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 11084 bytes
SHA-256: 236e13a5c0a7a521c264456a1efe366b306f1f9e69763905a5ed6d191a2b7f98
font_01_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 19240 bytes
SHA-256: c43b67d4ea60d812624a0174dd3c85d9fd02fd20459a20d2a99025c75d7c158b
font_02_sfnt_off00014116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14116 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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