Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ffd488d489eeee…

MALICIOUS

PDF

84.1 KB Created: 2021-06-27 14:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7c280836d13e3c10fb28d89a4b3bf70a SHA-1: daea638ec8690af58d45859f3ff9f5d8d04e7c53 SHA-256: d4ffd488d489eeee9b1fed6da2f2b46e982eff6f6fd85c259f2a3bea1589f746
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads. The presence of 'utm_term' parameters suggests an attempt to track user clicks, likely for phishing or malware distribution purposes. No scripts were extracted, but the overall structure and URL patterns indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://inwebjor.ru/uplcv?utm_term=gay+sites+like+omegle PDF link annotation
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081478e34fdf---30358284872.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/vuzoxu.pdfIn PDF document text
    • https://fallsplat.se/file/kufavixowaboxifitu.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/wugevivewowigiw.pdfIn PDF document text
    • http://babamoleskine.com/files/file/mapita.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/fakuvejevilarexatebije.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba46b22b040---xuxuxidigosigu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/fba3b2aff76b5bc23799c072b96c4148/porimapetogofaxaxozewo.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/hnbi9rcr6ndnkktq703cgt5hqc/muronanalekefez.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160852f7db3144---labenimemonisitutoguzarav.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/16957654250.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/21384404436.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085265716cac---kowitelevibazap.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095621959f02---91723834981.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/lopegobesumikatoduf.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/95706520531.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/81597515588.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098ea711c963---raganibofutuzewamoka.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/4692384322.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2jvkmn4kggtv5bcnul8k518uvh/fomibijebaxuz.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e9be4de3---33756558462.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/64342214376.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/batawivebi.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_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 17216 bytes
SHA-256: 072f472400da55329a13c9e29f42c6d09e0476c7c86da5acad58852a75a487b1
font_01_sfnt_off00011366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7D 10492 bytes
SHA-256: fa2330ddb2e63e405ff39d893d4bcc32f85a2bc14b4b1a1e46109e6d937e0a33

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