Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eba3bd9bd00f025…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 12:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aeb317001ebcead471ed47e94c3af241 SHA-1: 6de6eb960ca3d0da876b6f9b97b2c603e69bc078 SHA-256: 0eba3bd9bd00f025fc89aaafff849a272d8949eaa2ffbdade0ea298382a0a8ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=downloader+iptv+smarters+pro PDF link annotation
    • http://laduses.nl/image/file/83825125790.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/27034086004.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/41991008101.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5ffdfpav8ol3mp5fs0qsdrtqh6/39472101787.pdfIn PDF document text
    • http://djapm.com/userfiles/file/jukolune.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/87025436998.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/dasemomazetetit.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342952f095e---sipemobifutozolefiruboxa.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612feb8845d04---lepagubef.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/pegutonevoget.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/70383321790.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/abd8e29165661d41dd9e3e27fcc9231a/95880376938.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/10535425109.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/25928683261.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442ba8892e4---98748105020.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132eed9d1547---66942969217.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/fogusakisarefobopilodogu.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/jatibokexilotirukuwafuj.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613034648e720---vezozemovaviforir.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/xitojenesovobokuximadove.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/62815719383.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/40167842637.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210905003012.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/bumenomuzulo.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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 17812 bytes
SHA-256: ee0c642ad8b94f06355cd98df704a23f5fed4d4ea53b93915316e842fa74d983
font_02_sfnt_off000121ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EA 10704 bytes
SHA-256: 58942494f58193bf3cd55a6b42e809d3119e146060b8a248ddcbd50417733035

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