Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b3d588d8789247…

MALICIOUS

PDF

61.1 KB Created: 2021-06-21 05:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0bb22928346edb6f6f94722c054d42a4 SHA-1: e76c16d7e64164555a63fb703a1c9a41de58752e SHA-256: 97b3d588d87892476f421b697ccab6e055e2bd2917ce8df8f082602ef6ff6e18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://riggi.ru/userfiles/file/jesajugatalefu.pdf In PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1109cad4b6---zitofijin.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160965a0caf692---nopaba.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5a42fad1468747130a0875ae51ceae53/20090802195.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/59109824594.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/01343b3393581eeea21f22086d8ce446/47722379054.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fipp421osiusht2ugsjaqnuqn3/zonijakalud.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/cemrg22pt0pcosjoek7u9ud1jt/80543142023.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1bc3b84060ec5368b5b529476c9de930/basirigafob.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/d05b826c023c49ee9b72e7b3a4c53a61/vezadawamawefuvizogufetip.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b5105968be278bfd7800093c5b09293/femudiva.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/61477062839.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f6785ec82---dinirotubatofuvi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/76e6gq070tqce6kr9vks1n3uk6/9724615075.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/551d56c52b9dfc860f23b896f4573598/73587728999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=reinforced+concrete+design+by+wang+and+salmon+8th+edition+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 6104 bytes
SHA-256: 2c70687b31fa7863a00285c19c7e11063bc84471195731dff45188c525802dde

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