Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e2ba8499d02c4f…

MALICIOUS

PDF

89.7 KB Created: 2021-07-29 23:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 219c58510a8216b598de1cb3bfb2f8d6 SHA-1: cc054b2a83e54ea792a2a29c88b8d7d40079785a SHA-256: 38e2ba8499d02c4fe3b222183535ddcfdb327854e32138c07db0a17c64e47ebb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://nomylo.ru/uplcv?utm_term=pony+creator+v3+download PDF link annotation
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a33f4b86b---71732811660.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/kudaretibibos.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/dusaja.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/luzewaluzama.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/115d2555606d7de04a5bbf9eefa87340/99503372985.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/58018511766.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/falewoxe.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/a982f74d227a562cebcffdf92d961d25/boxutaxexo.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/xulotazunumimufuguzatak.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb1d6523b9---nofizuros.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160808b74e47a8---rezibufimisufuxuje.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/bemajawodow.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/vaxazubizeralojekul.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ab1a0862bec1c4d8d95d558e3b2c5392/72994935475.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/lip2jh95j7r5po1eosh9u0lma6/rosanatifofufutowuked.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/75513548730.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/68810447880.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/307be38cf4b8f4427f7bc75f9f755cc1/85371315769.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/lv65flhm3074ddr28mjnffejp2/novejelakepemaj.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/bodebazapubewav.pdfIn PDF document text
    • http://grimastone.ru/files/xovolorakiputesipona.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91fb4c5316---42330920464.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/mefesewajuwagatewuri.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160befba284d4b---45266256792.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 10544 bytes
SHA-256: 085280a1a4bd96ebbcd0ff406c893faae0a8f9dda6a42878e0a9e551abb8a18b
font_01_sfnt_off000107a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 17892 bytes
SHA-256: a28e28c82201ebd2fa29a5cf113029fdae6b1f6f43e529bffd536239633b728e
font_02_sfnt_off000136c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED4 2036 bytes
SHA-256: ba7d0941056fd5bdd88429a0d2efe51224a2dc7fbecccc87a781e66aa4301974

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