Malicious PDF — malware analysis report

Static analysis result for SHA-256 1910ae2f7cc3bdcd…

MALICIOUS

PDF

72.3 KB Created: 2021-09-18 18:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: 1eb9303fd6f81a9f9c1f8f5cddb40e68 SHA-1: b014092fcd312f342346b413b1bb978163eca765 SHA-256: 1910ae2f7cc3bdcd4e6248d9614008d5a2da8fa5193db53d68326edc50efdf4e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://beachfirebrands.com/userfiles/file/xurutokup.pdf In PDF document text
    • https://costarica4d.com/contents/files/zitoso.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24c8c7614770f8680696f15b1ba76bdf/pesidawixisajitejosavid.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/xerow.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/vugap.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/47738094538.pdfIn PDF document text
    • http://vucert.vn/uploads/files/98011083377.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/20353613788.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/mafizurezexituwog.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/90436584125.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/pexuvedifirev.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/16/zexal.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/sixapemilavutuv.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/bisariwonepizapaloliz.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210909062141_1216485703.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/tepaxedufopurugajexug.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gv1mufgoddi9ejt77m8o0jf580/30440173832.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/jumiguworeliluboki.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/77187788313.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/780c86f4130f7250fb0d8cae77f5e7ea/komejoxokoxufu.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/2908637192.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/gunevekipojevaxef.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/60416591376.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/nirowov.pdfIn PDF document text
    • http://espwireless.net/uploads/file/pikila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=private+zone+applockPDF 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_off0000b845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB845 16752 bytes
SHA-256: 0003bc6c396ff8fecea233952d862aff9891ccbb8d947cdef37a6736d06650c8
font_01_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 10420 bytes
SHA-256: 9cfe978c2395df8abe79568a8880e467380fb63d7fea21ba281f8afe82045898
font_02_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1