Malicious PDF — malware analysis report

Static analysis result for SHA-256 0903b01181c249ce…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 02:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 86905d26276ee74a126d6469088c92a1 SHA-1: 12bc666d1a77fa8fb56c9f83c20ae25c6343e785 SHA-256: 0903b01181c249ceac472ae3d637da194866c09c3b7670a14bf3577bd0ebc97c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • 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
  • 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://paymentor.nl/uploads//file/nufijo.pdf In PDF document text
    • http://sdes.in/uploads/27379379377.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/18288231052.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/p60oqv806a6ugg9hsshdcalgn7/vufubalikobapu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/6a5a94a83592019a88f22743a6905e15/16111016255.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/19698743593.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/e5135a85eb730ee9f52c7d8b24fef1f3/gowumo.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/kanurozinoguzunikow.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/81265649176.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/57898a1b9bd970a711df128f7ee52b86/tisilakezojitesulebib.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/047db8c7d0b8df771d6ab9d9cdcdd980/jokibibabojabufa.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d4d87e55a---fexagomakuropiginabezeg.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16094454d01467---rezusavovajilag.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/99973472780.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161142098b82c3---29531829701.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/87309877665.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076759b7b83a---37991337543.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/64467652512.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/nuxidijufi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611e8d66807c4---neriripatuxatesin.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c622502d7b9---gomuzomipas.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/85bc8ed57aadbc01ff31b250bb580e7c/20323923517.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/11663080816.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/jotisuzugas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=compare+and+contrast+technology+then+and+now+essayPDF link annotation
    • https://mediaget.com/userfiles/files/marena.pdfIn PDF document text

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