Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c96eedb39b508e…

MALICIOUS

PDF

82.0 KB Created: 2021-07-09 16:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 425e6964ce7feb729546a96954573553 SHA-1: 371641329a2a62df62dfc76f2551e411dae49f38 SHA-256: 24c96eedb39b508ebbbd4f429a75ac01c5d88f12d636104d7088d67e39ed5366
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or redirection scheme. The embedded URLs, while numerous, do not contain executable content themselves but serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ondrejkocar.cz/img/file/kekukaxevoniregoxuso.pdf In PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9244e6d99a---romusikir.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2bd558050---52767908777.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ade19286e---84798709573.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f54207182c251f6b15a18435514956c6/detetubepafakifomifakupi.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6bdad5b9754dbbefef5aaf4cb99d9213/lewiveniloledemato.pdfIn PDF document text
    • http://abpaluso.com/upload/file/povinowajavafurewulafo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/2d8eda996effb2d6ef1abcb73233a84f/26403074275.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/tawisodifejajaxutivi.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/zegekekevisofabidigurir.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3a7be2954---bolomelibepatewidizuzajer.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/24388686719.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1288164dfc---83635868857.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/02b7iek2vvmb6ac345vt03fnvo/95651911656.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1694884908dc4464f2b3c4218efbacbe/setegoboxefatezibalejose.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebd42986ae---kujiwuwaviju.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ffa8e31b9f---masurilol.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bff77e3f8---77439802998.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/huujrpsj5m9f2ggq1ammp0gpiq/febuwibagu.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/970573e42c0103a7ff8fd21ab974fe4d/mosogitifoxudafeluxogugun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+a+function+notation+in+mathPDF 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_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 10416 bytes
SHA-256: 825601423f50b9bbdd60de84eb9e5406eaa11a381b74da86189557c0e095b45f
font_02_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 17384 bytes
SHA-256: 8b79372bea5ad4113f8f9b4c28c9f118b90f69eb9a894b211ca64aaeadc1a8fc

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