Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdf56e67ee933ea…

MALICIOUS

PDF

88.1 KB Created: 2021-07-09 13:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ce4cadbe7c7a474ad2a64f2ff1b02422 SHA-1: 098c2d90d27ee975fe02e83a282de3a05103411a SHA-256: fbdf56e67ee933ea766bd880d6099e70a450132a221ecdf97af9c0f0d95e40a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://smidgel.ru/uplcv?utm_term=acrylic+painting+tutorial+for+beginners+step+by+step+pdf PDF link annotation
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55a88d38ad---76572500581.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/f22eda6320032ce41391b00ec1d4be9f/86507772247.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/bakepukuwilemibofanadipa.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/84405672537.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/72687421448.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa94b30f245---sexoborufolefo.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/dokowolezin.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3caa7ae2901a96aa1d81e3a940c06098/63967739014.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a34d3a85c4cb599e4875dc56121833e7/21018083659.pdfIn PDF document text
    • https://unosms.us/userfiles/file/tinokiwodujetuki.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/43023010629.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/532a69ccabeba8a2c8332cccb1ce73e1/61998410813.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b761a609926---303081336.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/80372061232.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/sesegazi.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/litom.pdfIn PDF document text
    • http://krugernilssonreunion.org/clients/c/c3/c301050bdfa85653d7453904791897ac/File/fixizekuxuzobixuzim.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608f225551ef3---datibusibuwesuxij.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608400249429c---57383894992.pdfIn PDF document text
    • https://sbufficio.it/file/sinonoxenusutaj.pdfIn PDF document text
    • http://yilip.net/userData/board/file/66360196160.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/84855566915.pdfIn PDF document text
    • 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_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 16792 bytes
SHA-256: 73ddaa3ffe27e4fb9f9743a033b6e96b681e8e599bee5ba1250aaed4e7270c67
font_01_sfnt_off00012128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12128 11132 bytes
SHA-256: cb67249af4bd7d236b829fd91ec8afedbf3224e89a00d9a44f30125394bd3ecf
font_02_sfnt_off00013ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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