Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87cbd04c8940757…

MALICIOUS

PDF

87.3 KB Created: 2021-08-14 14:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 45c1aef7eabae6289686be83ecedb937 SHA-1: 7b6a765b37f2ecf8f48427042da02d6cb59a8947 SHA-256: f87cbd04c8940757af49286fc23d4a0045451429d979e70ceb654958e86e104a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://zemiigori.com/uploads/file/tumolaratupabe.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e316d5822b---73063925786.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/53610852161.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/jukozafem.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/1bea361051935ab00710678303e1f3ae/28656986869.pdfIn PDF document text
    • https://anjingliar.com/contents//files/mudejugifuxuwofasesudilu.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf3591669---lijefatikemebupur.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b33b7794bd4b8ed77fdfc80b64d4814f/9845196988.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/75020416029.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/laxutarava.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/1l4rramlalrqn4cccuvltoi27h/33902788354.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/vinpna2assk1cb73sdghcgvaiq/vagipenojegofiregi.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/rosenejiti.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6425df8ebcfc6367b381b54770ba313b/92663125171.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/166e04614829e4bcae6d7a4c224b360e/kebazakeda.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/mimefunisipepibalezu.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/8585742746.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62b71e70c5---7119423832.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32063024015.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/cjlidkamv0o0sr0272h28jv9l3/mubeboredafamuxogip.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/kebudek.pdfIn PDF document text
    • https://oversaslogistica.it/file/33067727318.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4c014538bd259df44b94bdc5e71d8a63/42314719527.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/ludigepetapawebimujos.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090a1fddcbc1---62325503815.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9eb463bea---waduruwukenegesuvemivipav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bianchi+mtb+size+guidePDF 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_off0000ed67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED67 10904 bytes
SHA-256: f74553707ccfae4519b732c232e6313a3174df2ac33dba308dd83f3999ab5bad
font_01_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 18496 bytes
SHA-256: f689d2dcff96f618b6b5fd09c512f6d9876fe3e3f9b6bc69f307e06c01e16567
font_02_sfnt_off000134f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1