Malicious PDF — malware analysis report

Static analysis result for SHA-256 941a5c1ae42f6a88…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 17:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 7612ba02ff9ac95180b4ea3e3cce38b3 SHA-1: bd9aa67b8f7427c7c9c890dad550077f31b4651d SHA-256: 941a5c1ae42f6a8842ccea439afefc6ad0ae1f746a60a4ff82fde2bff125b741
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=hemostasia+primaria+y+secundaria+pdf PDF link annotation
    • http://gardenofsound.com/userfiles/files/likesiwakoroden.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/71006505858.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/1ecf954360bc91ff444ef3e7292b4db8/jepawebosum.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/sajoko.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/2e5071f9460f3dd4152b52d55d60ed6c/baxik.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/79521714862.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/zolofigujamisufirisule.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/nejogunufigudavef.pdfIn PDF document text
    • https://partetesal.ir/data/file/tumaxoparovinujodudu.pdfIn PDF document text
    • https://thietbigas.net/media/files/gibopawuvatumimob.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e36322c0a3---9024405962.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/31761407015.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/38782801175.pdfIn PDF document text
    • http://wawa757.com/uploads/files/pebexufejatumirupotiz.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/tilaromaxakulofumon.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/30461128088.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608736a75569c---batinej.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/nejonediminujoxamemizu.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/repufibibowe.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/gutatexojuzotadolo.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/20939646296.pdfIn PDF document text
    • 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_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 10940 bytes
SHA-256: f720829fee0342a8d7173196fc9eb7fedb873815fb8d6936a2ad6a78c5cb16d5
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 19256 bytes
SHA-256: ff308f91ac3d2cf1d194add5537917b09ea4f4af2f83ea912bd4ba316290eb97
font_02_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1