Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61dc88cd9b3213c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 02:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-15
MD5: 84acd9294c16cb8ce8b672984b55f003 SHA-1: b1b7d498ac0f637cc791bcc9557a1a12250cbe03 SHA-256: b61dc88cd9b3213c023eabc858469d74875acc16757e37a7a0322c917e1fb51e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://mamnonlittlesun.com/upload/files/36071352444.pdf In PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/2b152ba9148038d959407ff6e577bd92/nabudejev.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/vinefiwaris.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/30786795715.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16105f084eef94---bexelijivaremogemajutu.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/8161023694.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bad5265f35---zafobogevuzipetuzal.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/pumegafusesijevalukosan.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/7e2ef2abfecb56109262a8fd4a80d840/pudumunuzigenus.pdfIn PDF document text
    • https://mkart.it/uploads/file/wezoxubakegi.pdfIn PDF document text
    • http://surausa.com/uploads/files/32336211638.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/82849060363.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c934236cf2b---vetudifuzene.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/20108935331.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/13300834743.pdfIn PDF document text
    • http://juha.be/_files/file/pevejavomoraxenu.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160825ee43af53---86709240429.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081b5b35a77d---valugiwo.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/3874ff7dbd585d9c172349c190206330/muposedinogo.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/meneg.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/h1pj7hqealpg50v7ja0qp19kib/19361296990.pdfIn PDF document text
    • http://houselandia.ru/files/rovelukinasabevufiban.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/wefutobor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=two+step+algebraic+equations+worksheetsPDF 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 extracted file (font_00_sfnt_off0000c8be.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c8be.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BE 18208 bytes
SHA-256: 7964048d63a36fdd398e85590dd44de9fe5c940c2c1d838a76e7f59b43b4fab7
font_01_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11059 11180 bytes
SHA-256: 5f74228ebfa72d76b209e25ee5bb004263633e2153956e0b32b3050b490bff16