Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec97dfc98f33354e…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 11:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9d6073ddb2f50ef62d7bd8e2cf7d025b SHA-1: 913c37a31d2ce9f70a954b7b41a42111ae56acbf SHA-256: ec97dfc98f33354e85e1eb5f9d1ee0bfff91c89f6808a185661973cb6dd25fe7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these compromised sites. No scripts were extracted, but the PDF structure and URL analysis are sufficient to infer a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082ced2b4af6---ruxawosixapenefarufejuge.pdf In PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/i5rmveki76imntmipan1ir63mn/6479504601.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e327ea8af---36212536476.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/19113812550.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b7ee8ad36---33853534214.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/883d3b7fc50f903451598937f5a704bf/lowezivakidurebufanokamat.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/katapiwefamivotikinutakok.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7accb13582---xezitoxosujaxorirakena.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d2387e46d---zasukinimolomuse.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093d282103f8---nalomuparesowejasej.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/24130198638.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/modezemaxupawawulazes.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6eb56f67e16fd7be0742c933d5ae0aba/71878339038.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/9906445134.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/56387780998.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7cd6374145742f59ab9118d40e22e468/7813191054.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/koxinavawasat.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/69b26e0d8181bbbe9306504773f1c8b0/18670390351.pdfIn PDF document text
    • http://coffee33.ru/archive/file/21378706527.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/rovizaboxuzorojagotegiw.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c49821a4c75---92735299228.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/290120199701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=professional+tips+1x2PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE711 17488 bytes
SHA-256: cc196e15f775882ec9542d749907e0158604dc03e787516d876a506f5530ead1
font_01_sfnt_off000114cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 10624 bytes
SHA-256: fc9662bf15916e8bd4069c1059d2444655abbdd55ebd5409aa0b2f637d977979
font_02_sfnt_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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