Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9e2f40db3d7feb…

MALICIOUS

PDF

88.4 KB Created: 2021-07-06 19:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fd2785123e2f3c9c73ab980ce11f176e SHA-1: 719e3123e9e4e4bd222749c060a987fcc5d31f7f SHA-256: 2d9e2f40db3d7febfd0d2f0cd42b5812429a0365ad9101ecd694c3dba4b0b3c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/0eb151e78b8d52e8095615450046bb98/solinebuwurowaresa.pdf In PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22f2086ee---fovujewegalopofebiw.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/83171154866.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f50d88350---zetazabesenazas.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079b7a787f85---sebodomelofekoxaw.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/veror.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f866e36f6---kafasadexopoketokoji.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/fogawirixaja.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/borafapexif.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/60285209125.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/zusorozaz.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/baviger.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0885040cc---5567451737.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/87612d5dae89f8a6a1f5eb5068119763/setemapedalebirugaz.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/53841743184.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8566f884---xaguzadojafebove.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/j9leed8oseohhr12muph2d5u2d/85370061870.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841b3dedd3b---99224611502.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1e48e954e---fapenubaxobewogufugabosis.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096541bece4f---67902257169.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160756c8336c4d---liroguxotezubeluletare.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b1f97cd0f6005b4185cd72dc5fdbdec3/dazel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=cellulitis+signs+and+symptomsPDF 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_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 17064 bytes
SHA-256: 77d4a9da0176a7e4220d06592ea676434b243996451428fe59e68650a4ea9bcf
font_01_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 10880 bytes
SHA-256: 5eea9147e5a798185a8573aacefacb40c386c85d35e2f369c9c11a2b0d9a2d38
font_02_sfnt_off00013c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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