Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeced6557368cd6d…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 18:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7d624ca471ee87e8027bc6e9b85d6aef SHA-1: 5550e4f5da1cca72e81dc287a0da230419121b12 SHA-256: eeced6557368cd6dfd209a7b471d96890adeb4bd5222dea8c757299dc8331cf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, many of which are WordPress installations hosting PDF files. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement, common in phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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
  • 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://smidgel.ru/uplcv?utm_term=words+with+gre PDF link annotation
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/0c3e3d23f5a70712ca3149f765962879/21463126258.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddc43c8093---29189298208.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad2b985d6---mawitaxatipowub.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/rekalaxodimulalimo.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ccc33d54323195odclb8v9nmbj/56697553972.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/vemusogub.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/82acaec16e56345510af1aa060db3b72/dilabanezupomakibojujusup.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e429ba712---1580630115.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/xizoselepevas.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/23312263295.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/narirumutepitoragi.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/28385671352.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/tawomawemipupopa.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/saletolo.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/130887936160b6b982a8773.pdfIn PDF document text
    • http://chhsclassof64.com/clients/b/b2/b21d6454c74b38f294a67049e63db9d7/File/47533542524.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4485154140e3136ed2aa79f9581f582e/58935583544.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e2600709---45576423544.pdfIn PDF document text
    • https://kuepancong.com/contents//files/87287218316.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/nl6hmbmeurkbb1r70punnjqhte/vojowuresilejet.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/92026b6603179cd3748c34a277d6abf8/51939838067.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_off00010549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10549 10292 bytes
SHA-256: 7f1f451c24011722f2965f6b90c27cd202b2a44f1ba786df0924c76db95bd1ba
font_01_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13488 17196 bytes
SHA-256: 45096985c918ca503f099a95b0169e572367bd34c9cdd00c3c450c09e4936a5a

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