Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1fe4f037a513b8…

MALICIOUS

PDF

78.8 KB Created: 2021-08-02 19:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eed451558d0e2b6eec473d07d4341a67 SHA-1: 968f7ba920a81fbef00d54977af7feb54a03bdfb SHA-256: 8e1fe4f037a513b83c0f4b8e0c24e50357f0ffa733017000f13ba7ce43ad2ca4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm for distributing malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://boisehighclassof1965.com/clients/879780/File/71066710924.pdf In PDF document text
    • https://hanomanberjaya.com/contents//files/dakasipoga.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/12133959890.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/faxaxezeriri.pdfIn PDF document text
    • https://sce.tw/uploads/files/60e7b84b46487.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/boselezi.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/50291205465.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/nuvemevalesepo.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/cdafe91b5f9efd082114ef1b254b37fd/foleloromedosaz.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712a5e27fad---kiwiwomefinamufolesexo.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/74630915412.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/3565506253.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/gpme6el9e80buvaq7713u2e1qg/zenogosewekusonos.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/ketojubowefosiramik.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16095a41d0ed05---tuxajusutol.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/af315ce06e162eb76c5283c49cec0c8b/91399654174.pdfIn PDF document text
    • https://educhina.mn/editor/files/49550075654.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/p2fj9nl4tboikv1m1o9bq242fm/97049417650.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/muvewo.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f418546339---83995719724.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/56ofdu70gctnkbvpn3ppag7iv7/94133958902.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/91916113572.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cc1da0dcbb6bbe0245738b6966bab521/fisatojezusalikifiditara.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/bkda2s8jda8siins6oe9l658rh/78560822083.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fa6c70dba7488da3b8d856ad6d6a2cde/60303295271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=cuantos+ejes+de+simetria+tiene+el+trapecio+isocelesPDF 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_off0000cde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 10936 bytes
SHA-256: 9d9396ea37676abc1957868f2d6f5ee3ae3e7c77e9011f048284284abd716078
font_01_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 17368 bytes
SHA-256: e06d098bb39b58ee980e6d150460b17abf69bf55f37b2f02aefe11a312f33911
font_02_sfnt_off0001135a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1