Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d1e23a2ab807f8…

MALICIOUS

PDF

74.1 KB Created: 2021-06-26 09:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eb3005b673480bc24a442e68c4245f3e SHA-1: 0a6f8599bf1bebee91c90f586d3d28c63312efca SHA-256: 18d1e23a2ab807f8f9202bc28ff502ef5f378f07b26f4067483eaa55fc37cb97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://cimkezes.hu/uploads/ckfinder/userfiles/files/5423035957.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bb92cd96---48450166439.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/c24066268b7569966970df7b6b6dfd9f/46464758838.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/22633bb37ee092bdf3571d6dc80f7111/megeka.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/65755480617.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/guxoselaxure.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/givujubavufoxaviniri.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/jediwodofononakigudujo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/sogedadugav.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/66435858974.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/nafanasugeko.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0b68f5eeeb53856254e334b6db4d2f9c/nofelisamuwalox.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/tatufudapojuseboxav.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607907f93b6da---kuziwimobozavutonob.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/nufajuri.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/27437374705.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb73a8fe1---28645943114.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c224f212e47---29406662460.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/26425051346.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/ridolivezatufiso.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/14335874930.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0de275bf---84137289942.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/63170778331.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/19545194304.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160829e8f24560---26608667816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=trollface+quest+video+games+2PDF 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_off0000bf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF17 11112 bytes
SHA-256: f8ec321ba0013315fd43e598937119f8a06213dcc6a07543c07c0b22503a8fe0
font_01_sfnt_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 16240 bytes
SHA-256: bdd0e984f5be1d8fd866eb06d2577df4f50918630046f8b0bd4351dc3fd389e5
font_02_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1