Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b13d62fa9a8f58…

MALICIOUS

PDF

85.4 KB Created: 2021-07-08 06:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 19f6daec2b24a0361cebf315f030bf32 SHA-1: 80158bf67a49f1585a386ef9ec133739e62669a3 SHA-256: e8b13d62fa9a8f58f187398d73deb183a4f53a61db351cdbe03d1fb3d374493d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, hosting numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The primary attack pattern involves luring users through these links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1bde1ee2---55867344908.pdf In PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ed8c69230---jefuderafisufopaf.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/9ikinvbis1dsk3k32m4bgvpesa/geluwogik.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/55786827111.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7bb91e4b---25046226512.pdfIn PDF document text
    • http://kinocosmik.ru/sadm_files/68991476399.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/vikefe.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/sitakexakepela.pdfIn PDF document text
    • https://t2sc.me/userfiles/madakosexegutewu.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/32589374944.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609889a9056f5---sixoberulinalewif.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/bonanosomiw.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/28386151726.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/jdufbf5akka23ifs406tgtjqh0/dopisigojurukamir.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/zozixadedanavobisiz.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/kagozofukogozodiduf.pdfIn PDF document text
    • https://cristalensi.com/public/File/wozevapawixofoguzobazog.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4720e0ff07---kefalifiposu.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/mejima.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/59cdd5052585aac70b3b334f45eafb08/tevagikufotopetofevesi.pdfIn PDF document text
    • http://rld-carbon.ru/file/telezobajina.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/79804645830.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/08fe00cda415d55ab553eb2898038371/kimagogiwubelofumutaji.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/mdqojj7dioom0dgjdtuc8ifb50/nopujaxerabaluminezupoze.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/2c16309d0b6e7a30a11239c919b475dc/75361485771.pdfIn PDF document text
    • http://cga82.com/admin/File/bidujigixubezew.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/biterewuzudedona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=beck+anxiety+inventory+youth+pdfPDF 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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 11032 bytes
SHA-256: f70999dd8cda112a478b1c4688e01201025d596ee258a53f3643a4fd922c5fae
font_02_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 17788 bytes
SHA-256: 1a5057fbeeee5d3907ba551b9685a7439ebd95299cc6034e9c814e429764d8f9