Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2c2333b0ddc4a3…

MALICIOUS

PDF

75.0 KB Created: 2021-09-01 09:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3c6ca63cee2d618c592e3a04b15a47ba SHA-1: b8016ee7400ed9713f0a4b6759c586169a603b84 SHA-256: ce2c2333b0ddc4a3d65de0b3230351d5fed4fe7d583b03df56a649703488a426
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 0.9987

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://nomylo.ru/uplcv?utm_term=minecraft+armor+and+weapons+mod PDF link annotation
    • https://anukulagrotech.com/ci/userfiles/files/jumebutelizadevarud.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/10795675715.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/2fb7e485dce5aca34ee42345b98513f1/sodetuzosap.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/topizilafesuwuromod.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/kosera.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/buxekejowopisiwexere.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b9b45f85d4e9af17fbe1890d7681ba31/togitefo.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/58372159098.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78872445d5---45055775810.pdfIn PDF document text
    • http://zimmerei-possert.at/segajonafotazi.pdfIn PDF document text
    • http://seamacros.com/upload/file/zugumojogelifojunisew.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161197fa8a44ae---41838593481.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c9d49c28cf7ec94f0c6ecdf99b9ca796/gukulawinogupexusizab.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/gifugo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5d7a360d0---90276452826.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/38608641814.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbee464ae43---95492175548.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/5963688377.pdfIn PDF document text
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/nororofutoderulos.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/21804714128.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ub5jdo47bh86an64pn3t5uvgo5/85024876925.pdfIn PDF document text
    • http://kasargod.net/uploads/file/59248493378.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/kizidere.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_off0000be96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE96 10812 bytes
SHA-256: a6ab7c3f7f939c03fe85311048adfbc362b1e00326cade669f27903533948d6a
font_01_sfnt_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 17096 bytes
SHA-256: 11ba049ea54e5f1156d2eb3d1e4d1ed055bc65bdbcfad0fe6910cfb372593e3d
font_02_sfnt_off000103a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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