Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f1e56dd55d7d2c…

MALICIOUS

PDF

75.6 KB Created: 2021-06-28 02:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0d23c2ad02ce0ba0667917636dd99aeb SHA-1: c491f94b7eb81b3fff72670b81361d0fbb35fef5 SHA-256: d5f1e56dd55d7d2cbe7d0a8544d762f65f9151aad48a37acf7cef421c1f74074
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious or phishing content through these links. The document body is heavily obfuscated and unreadable, providing no direct textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://tfh-filter.hu/_user/file/surijematodo.pdf In PDF document text
    • http://startmatbaa.com/userfiles/file/52311229990.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847947f4100---45097051118.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/rewoka.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/binuratiwizubo.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/54112702820.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/49877074776.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/c379bd84f382435bb531d4750c8999e2/33153305125.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2a734504---divagi.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609692008dd9d---fudexi.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/738a7346193323d10a69f4820c6a3125/gatuwepavurutasapuwe.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/kebowoxivonalagivemafete.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/75440179729.pdfIn PDF document text
    • http://turnyras.lt/Files/file/21786780091.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/kasimemodegi.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4eb8e670b2a3693b953179c60a7cb34a/56491478447.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094726c8157f---wugefiv.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160974dab59077---77173926299.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160911e7c27244---dejujesitujoj.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/77423516174.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/qdkjgrohrrl4sjvkgalcc5vnn1/21738541286.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/turem.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d2328061---21179059132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=label+the+parts+of+a+wavePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607146cb17a31---77665839033.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_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 16388 bytes
SHA-256: 4baf931c3a1fde870b03fef6c9f4ab8eb9bc30662895ef13d1b6a9144d16bf72
font_01_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 10508 bytes
SHA-256: 0ff85acb4cc1d0ca4a5f82e26a47efc630477d77b854ddee93f0bdcecd9c57c2
font_02_sfnt_off00010929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1