Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2d58fe308f051d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-17 12:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d47bd3231d2055bc76f473ab5540054e SHA-1: 3b9a5b1dcc8104e7d17382dee41e76861d9d9a61 SHA-256: 9d2d58fe308f051d9684d50144007e5542a06e3b0a0e978cf1963c7eccee57c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were explicitly extracted, the nature of the URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://medvor.ru/uplcv?utm_term=download+game+naruto+senki PDF link annotation
    • http://kozelsk-adm.ru/files/uploads/files/motusepededofigu.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/32880648479.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/26686311621.pdfIn PDF document text
    • http://salespate.com/userfiles/file/36275969197.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/wixudowenowolevikima.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210901_B7E6BBA6516F77E2.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/8144932666.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5d9797e3d---28192123410.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/lukamilop.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sedatibes.pdfIn PDF document text
    • https://tessuno.com/upload/files/61404c97d4f61.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/fitup.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/sokafozitug.pdfIn PDF document text
    • http://innotack.com/userfiles/files/84200948427.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/40041641134.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138e49ebd536---guvuwatiroxomagituma.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/87731567476.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/36665765159.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nowepadimusoxujifabe.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/161434e51d1087---gipedapapoliselaluraxano.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/muxutupimimuwafimafo.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed70dc72cc---nalefuxugijiditiwuzipavu.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_off0000c273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC273 10872 bytes
SHA-256: 4576ea2925b8997515101071a45d2a1e28089582c60d69d209f66293a7937f3e
font_01_sfnt_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 16336 bytes
SHA-256: 81874752200c24edcd7175452567122de9f277ae1339a311f80f7d12ca71b13f

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