Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b1469c0a086cae…

MALICIOUS

PDF

84.9 KB Created: 2021-07-05 13:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e3ee3192fe2f86cbe3a8e5c474b99e57 SHA-1: 168cef5e0d5f5df8e75f22f1be3be787a94a9bcb SHA-256: c9b1469c0a086cae3ab21a0d59a039958ee4eda8fb02487f4cb6bcbef0494cd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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 pointing to compromised CMS upload storage, suggesting it's part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd30c4e26---xunesegeje.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adec64d09a8---kusoperewibugenib.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/rozilijameb.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f183c8d90f---zixibopizijupexaratowa.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/25848871782.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa2ba06429---vaxavuvozoxinugiweg.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p60h981mi9ul2dqg39btj8u3lk/bazodukejejenewaxula.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/01d1c8caf103267f678ca7c229ed0c05/42126609611.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083b67b3c7bf---21455465131.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/lozineg.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/25240544928.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/sewozovu.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc373befe09---381175139.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/58498127108.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/porosozigamofuku.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6f53a2f8---baxijo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082cb626b520---gelade.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/695ae603942d0f3e7b26cf0ea2bb7980/reparimomademewinar.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/dd8e9e80cab6263ac6a4aa1f1fb53249/95355283934.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/wasiwulowetis.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/17335632519.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089cfff28e43---nowawefirabigofumadisem.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/3kbvk8c45t2evj5su3got4os31/xixibulijoga.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/rebixavana.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/xajiwevisavukunezopadebiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=system+testing+and+unit+testingPDF 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_off0000e8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 17804 bytes
SHA-256: 563c614cdb7492f6e0a5ce172487bff14b37abef29ba7e4584fd23b4d245313b
font_01_sfnt_off00011658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11658 10616 bytes
SHA-256: a34acd2d1bea5110b274b7eb4af491195d39cdd902ac67db96bd58133ed3917f
font_02_sfnt_off00012e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1