Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e6d9582392d779…

MALICIOUS

PDF

82.6 KB Created: 2021-10-14 05:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 230b3d8a35284701b716e5be09ee6526 SHA-1: f59675ebab686fbcd7f7c1e4706f2dde62aa56b9 SHA-256: 15e6d9582392d779e44ab0b2a989b4bce73ff260ff8b8175f47ffd5dcb56c1d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=driver+booster+download+key PDF link annotation
    • http://grancanariacomercio.com/documentos/file/34883172142.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/fozunapadekake.pdfIn PDF document text
    • https://cargobull.cz/res/file/9403450328.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202110030946304224.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c0ead9ec4a36c651a2a10a55c7f8088/16568996322.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/37550558447.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/ragopuvivoberug.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/doluwabejoxa.pdfIn PDF document text
    • https://wildnaturetravel.com/File/bokotuvitudebodipisotenu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16164ab09d00ee---64812838563.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/40297686643.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161376aba5180c---kowitu.pdfIn PDF document text
    • http://rapet.hu/files/32987302496.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/55930475266.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/96454746714.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/25148675958.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/meduderubi.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/34834514817.pdfIn PDF document text
    • http://floramarble.com/uploads/79412065782.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/83064008511.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/resesugisezofafij.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/diwiviresesofakub.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fh80bs49sfba68d0b8ru7r2m00/zizewopagazaridubaruzus.pdfIn PDF document text
    • http://telektrans.hu/editor_up/77648583582.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/suzeso.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/wiwuwonuj.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_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10740 bytes
SHA-256: b21ca1155668a2d29aedcd1197b091eb1a0db6cc00bdc6cb319c120f1e2f0d23
font_02_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 18952 bytes
SHA-256: e25f86a24c2f788ef803f28a43590e52a94af7b33817c2df31bbec7a442eebcb

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