Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc7cfb66acd54a1…

MALICIOUS

PDF

89.5 KB Created: 2021-06-26 04:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a295f20fb8ea5bd17f07930a9d6e94fe SHA-1: 915ffec5bd536a545118c5fd502b8782d113961c SHA-256: ebc7cfb66acd54a12f9a09b4b29b885d0bfb1459c43b04fb5db7aee6baa6a752
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress installations. The ML classifier and ClamAV also identified it as malicious, likely a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6751654b35e833c1dcb8dbab0d39dbb4/38905446858.pdf In PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b5244aaf---76818911818.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/t9vv8d025ie16e2n6l6dv3gj3s/nejurigubofadumilefugo.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098eff1b6a8a---pesadiwivuzesimulobokefa.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/norojazunifalukiniku.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/jozafenijo.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3b25818ea---ripetejafowiwegezulopomu.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/95220131305.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f9c44d56d35fb7b5ce6d8621ba85c0d5/91949217415.pdfIn PDF document text
    • http://goref.ru/files/file/wujemezozeva.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2j2ffu2lrtvlgsfp00shhlq177/90265270769.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d41145561---28642203181.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d950126ed7---45983797508.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607019e11f107---26559752603.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///ladebewojezabe.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/f5k73ke8nblv08crbq209q6un8/nudesawuxuvufimisonoliko.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a020f07abac---92902871305.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nunutejiberifafa.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/wuzigunenakaresil.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062301591625.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/j9tivr2dsmn05huj5fhenps71a/denuwiluwojuvutene.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be554d2e5a0---44233499564.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/sawebova.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/cl5c9jvcihds7as05vn8u590r6/36502866493.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/97726424309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=call+voice+changer+intcall+appPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 10584 bytes
SHA-256: 7c626e46d4da005176e9e37ccac06e4018de01b77de006b77e593a18c0a87b63
font_02_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 18524 bytes
SHA-256: d7fedf1589c7fca5240272ce8f2ce743648f1badaea3df7b72d69e535fd486b0
font_03_sfnt_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 25480 bytes
SHA-256: abf5375aa9cbefa0269d11624e8d5803b053074ba62a61dcaa95fd0b252cd59e

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