Malicious PDF — malware analysis report

Static analysis result for SHA-256 4451dcdcec897530…

MALICIOUS

PDF

87.3 KB Created: 2021-11-01 15:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-11
MD5: b9b7995428b8a9d58a1b65a664b75311 SHA-1: 8d37bae1101ba42b91a31f89fbc488b8dba4c443 SHA-256: 4451dcdcec8975308214ae6e2412917c7374ee33a9df0a4a2d5e97d2d37d7a8e
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=when+does+fall+start PDF link annotation
    • https://global-product.org/CKEdit/upload/files/wezow.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/10011084615.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1616472950fff9---tokejedi.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/napalikikabu.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cecd7530f0---36510928386.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/73221858081.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/tenomebekorexewexuti.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa90e2c91a---49674789190.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/16877089630.pdfIn PDF document text
    • http://ux-school.ru/files/files/wuvenewejixujiguji.pdfIn PDF document text
    • https://vzglavniki.net/data/file/54857996131.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/bifaneforikexanuvene.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/95252705448.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/267f597854acb6e6c0e47387edb90577/22238386739.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/gevoxoxivoxipixatulino.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/pinafanukasega.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/sidipajirosewidevorimarez.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/fopojoj.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/99543824798.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/32075752178.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/46184233824.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/niwokuv.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/binefotaxakix.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/4036980613.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_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 16920 bytes
SHA-256: 9719c78d077eb1fbc430c559b15cc179db2115899c446758688ed7ef13b69f3c
font_01_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13892 10352 bytes
SHA-256: b9827451ce05bb1ce482bf95f78fdeaacc89266e21d2329b74087a62b27a2594