Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a306363a17274a…

MALICIOUS

PDF

80.0 KB Created: 2021-08-11 14:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb605740d57107d3213865d0727ca15f SHA-1: 7a533d75f94cd5c9ee5e9f72d662a70df249176e SHA-256: 17a306363a17274aa0a1da5beaa7f2798f0278e2868c04eb2776412a0d3ff81f
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised WordPress installations or disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or host further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8784

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 http://daindnc.com/fckeditor/userfiles/file/napewudimitipenove.pdf In PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/51456307993.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e1a58c1ebf8e0f1f765a6386d2aa4d29/kixolazujuxixekofifeginu.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/8c4bf1447c9ad6539996d3217290e5ee/34161520652.pdfIn PDF document text
    • http://ludbaegitim.com/calisma2/files/uploads/7222471733.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/1616c6197401962b5a67b9280a03e940/7577790456.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/mupekevoganapugo.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/33759530230.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/061ac0943cb136a727a63e98cef90101/nuripeturanogemi.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/23408687411.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/79790675840.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2e7971e2d013466e215f8816695b642b/fewexomuzawuwif.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/fikurugizirixekipub.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/pazigasalepavemivuzunudi.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/95221801468.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/gokowumunabigosater.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5003a88ecf---81702152450.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/novoxokemavos.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/81668030246.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/fafamora.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/8db244a0004f6319ec86d7b2644a1f76/bopemep.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073406ee3549---jofikepimezifif.pdfIn PDF document text
    • https://telorgabus.com/contents//files/manekovisomimirepup.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/af6l2c7c3ho42gbbgsumf4dvoq/39428762464.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074a72e6a441---69578797654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+much+sugar+is+in+winking+owl+winePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 10848 bytes
SHA-256: 5154dc3629e25dffae30304e22391339ca4cd0f64afc34d87fe45dcccf042bc2