Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd72167d71fe878b…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 17:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 117d03a010e0167305df23401bc68ad8 SHA-1: 8025a1ad27d0f4c0dfd6f2f732ee69aa1a3340f8 SHA-256: cd72167d71fe878bfa54be275208efbda12f5baf7edcd171d8fe4d901ecaa9b1
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://teewer.mn/ckfinder/userfiles/files/serojiburazeseki.pdf In PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/6474698818.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/80329720166.pdfIn PDF document text
    • https://kapefashion.com/files/files/24996770088.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/68230610981.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcc1c5f810---99812243009.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/rubak.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/85968089989.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/35290774185.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe33969505---37319748448.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/lobovajumamab.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/89796578792.pdfIn PDF document text
    • http://moristas.com/userfiles/files/65292659953.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mcrvkl9re0p6lso9kdset5988g/wabewage.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/rivisenanepoguwaxalifige.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/fb78q4knlptor9tukiepu0ssvi/62774543369.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/12026225324.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/1230510565.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/81925023427.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/54662865015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=i+words+to+describe+someonePDF 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_off0000b11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11F 10500 bytes
SHA-256: 0fb77b00102a29d7341effb31df62ab88e86ecba3c7692419d3a369c4384aac0
font_01_sfnt_off0000c902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC902 15556 bytes
SHA-256: 9513fbb3fd420fe82202c3a8d0f5c57bf08edbf4d671cedbf05717b004197e7d
font_02_sfnt_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1