Malicious PDF — malware analysis report

Static analysis result for SHA-256 342ba9c5af8bc4ce…

MALICIOUS

PDF

87.3 KB Created: 2021-07-24 07:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 95a140cdaca37f17717dfd279df80950 SHA-1: 8dadd88a05fd564091c21687f6ca453d83429a59 SHA-256: 342ba9c5af8bc4ce632796cd5c2990384a3a0bc047a1ee1b8b47521fdfc91b74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://fra2ange.it/userfiles/files/89843931907.pdf In PDF document text
    • https://zoldlepes.hu/userfiles/file/16249095565.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e9c0189ebb3ec4bd796a386b6b19669d/40782397856.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lh7524o6b4615ps8hhvlfvtkfo/xafeduxudimatedonasugima.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/3230590597.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/f84ci8gpm96onfcimc0ji3cmas/69956324020.pdfIn PDF document text
    • http://kbchina.de/upload/xowazovijifigasaviw.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/40034782435.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/63430869471.pdfIn PDF document text
    • http://charlotteellisscholarship.com/clients/a/a5/a56794a54ce3a7e2a8fdc514f00cf952/File/jobonaxupigitefusogo.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/wogodiruwetezunopi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070d47b10859---loxasup.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/tojavaruraxo.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/55756498263.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/xopegerowupovipada.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d258683af---gupetud.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160edaa8529caf---magajewamon.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/boxevatolerovasetet.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/08ltdi1cslcd08ou5l47fj2b5h/vapizafamu.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/41fac450e7ae6efdfb3c4b2452b82b78/40914132411.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/32177421842.pdfIn PDF document text
    • http://strap.sk/uploads/files/65816462646.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c334cd3689ac40ecec446497691e6373/88399986225.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/baxopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=figuras+tangram+para+ni%C3%B1os+preescolarPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 11000 bytes
SHA-256: 12420f9b3b2ad76cc7c14aafdb4a62208330d55627bdb0244e616f5db08e9004
font_01_sfnt_off00010674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10674 18176 bytes
SHA-256: fe3c1e9bd25e84f149776390ae22ba23d45542a2fa338e5977cadaba3c79ddd9
font_02_sfnt_off00013527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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