Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e213997f0c48798…

MALICIOUS

PDF

85.4 KB Created: 2021-07-21 05:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 10d6d5eb9b1b37fa2434fb4e77ace01a SHA-1: 9f8fc0f2257214a6c9384ceabfcd90bbe24bc05e SHA-256: 2e213997f0c487985da97f4566b8fab9f1c3363002f5dab8ece81fa336cb9a1b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/8293201437.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ad92734bd78d15886804c47742f19c50/lawuvivipurupokedavug.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/tenotexabawanekowow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a2449c6c---75780035307.pdfIn PDF document text
    • http://matras-devison.com/upload/file/76409289502.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160884e3325eed---jiwaponatavadano.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mvi5n9flnseajka4sn908u7jqp/73261228168.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/o1q9u6c48lsvg5h6bno1ud4bo4/kuremo.pdfIn PDF document text
    • http://faradbox.pl/files/file/1826916207.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/a4ndladd299kh2ipkqqaeal925/bevuzimopibeb.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/85370596842.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ko0bnol508g4re771cc9m20o2u/54450851528.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e33b158669---44832631773.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/uqlf8j1ni36pa99sg990kqqb51/zusativutelezojotozifafo.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/10c93ee910d69edff3aa246b13513be3/9102382684.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/94578019569.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/diwedekefejuzebulojevuvov.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc29a55d68---fevuwikapowa.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/tuvopif.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/97855675781.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/jagokimazeviraru.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/40561124295.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/c4a477f19262dc648b0f10dbd9a4239e/kabujinaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=minecraft+how+to+use+trapped+chestPDF 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_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 18252 bytes
SHA-256: b7926c6e0fa34328ed303a8d93f3ec5300dc320d63b338991e1178f36a3ad379
font_01_sfnt_off0001174a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 10852 bytes
SHA-256: 392adcecaae815708790a78add1df822476e8c333b52eaa457438c7d001ae050
font_02_sfnt_off00013064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1