Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d66f1530d2c1e9d…

MALICIOUS

PDF

92.0 KB Created: 2021-07-03 09:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1ecb5ab2274017ebf6b4655f487cc794 SHA-1: 33fcc90bd26bc278e4c577b6cba2ba5ffb1812d8 SHA-256: 8d66f1530d2c1e9d3ea54b2ea86f3692bf4565a12f0215023a27fc731ca5a5ea
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous links on disposable hosting and compromised CMS upload storage further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be53ce7dd67---mavuwetopupelulekemasuwij.pdf In PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8a088a6811f1c8bf9d3382c4c9275f1a/82932447114.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ludepiloraji.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/romaxesiliv.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160718efd1fdd6---kegumufi.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092c1c204282---dodifanoxa.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb93a7def---tepidowipepopepelexev.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1e0dae03aff7309d1773ddbdc7c9f42b/buvagagesidovazilaj.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2r7m71erab0k2ofkbrgpuqajqa/dusenerukadi.pdfIn PDF document text
    • https://plasy.com/uploads/file/14445397736.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/dnttl47b9nofk1kp774lb40sa6/derakum.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160960cf33b760---7024012359.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/31434377896.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160738e4286126---nesapinidubefave.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/wimexisovodo.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/7jm73v2jfnjbehdllg6r04tcmq/guraxasapunes.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/25252921863.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/21298037867.pdfIn PDF document text
    • http://jp-cable.com/d/files/forisevo.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0de9169279622891aa5828a446be5cbe/kewerivopotewi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af662347155---rolodetar.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/v0ogs7cvesr8u8l72gt5iv65j7/mumeligiximuxukarejug.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/54850989126.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/gobakufofukugakakowodunab.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4a5294f9---fenudibokubujebix.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/33711798362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=doe+bleat+meaningPDF 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_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 17308 bytes
SHA-256: da61149c61b7444dc5ff49f40d81934dc2b81be59bbf985941346981f26ac580
font_02_sfnt_off00014a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4A 10324 bytes
SHA-256: ae2f30e82484281e9216587b742c736901d17e51ce80ffe1070ad62c2f84660d