Malicious PDF — malware analysis report

Static analysis result for SHA-256 c040d67aa7c6ba8f…

MALICIOUS

PDF

118.5 KB Created: 2021-07-01 12:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7275b33a6857379e01261ee4d76de615 SHA-1: e99af708e174a2a183d8ea8a5e5cd8d43ac07b39 SHA-256: c040d67aa7c6ba8fcc5cd0c21010099af19b361d32ff17b1d3a8db2be471876e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites utilizing form upload plugins. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c100df6ceb6---kabopogujezimizelekuke.pdf In PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c4ab28eedae0c04c4bdd07db7759848d/goxisedurapinozuvimejit.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a95a11538ff---penisobulitexuwegopubol.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/3k80d0egqh4b210asjiqhd1hi7/zulovovubilaporexurag.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0738756001624487222.pdfIn PDF document text
    • http://dothi.info/images/files/59783052288.pdfIn PDF document text
    • https://micsys.in/userfiles/file/18613546234.pdfIn PDF document text
    • http://apsons.eu/files/file/82237557912.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/desogirokuvizemijubume.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/blv53egcc6krdpauibhgks4gg0/remer.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/cqbao2kuvtfo60quot8n2uc59u/58360410762.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8d6f671824fb380243caade09df5b825/libivutape.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/aaa35ff3e7f0a3e305f234782189819a/61018080996.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/pixamokovuzenu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/aada1d9e98888aef51bbf7b02d0eb8dc/tidilozobilefivavalof.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d68519f217---72971602379.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160871bce07507---tofanijix.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/68743575521.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d645161c60---85954068301.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/52775343886.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f498f6092c---bosav.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad87aebd012---kufesogesajatogek.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a6365901---wubofuzinisesutez.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d30d40c95f083086abc0e9861f5ec70e/68141712314.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/bugekepekubosujejubam.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/dc8815b442ca7ebc2da675419a4b4c82/sexavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=strictly+come+dancing+sundayPDF 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_off00015545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D57 17616 bytes
SHA-256: ec0ab78baf29d39aa6cc690e662df240d2a12374b70de03c817e9b0a54e32ce8
font_02_sfnt_off00019bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC9 11004 bytes
SHA-256: a06323396de435465c6eb1439347ad741127e54e2ee71fe0de844eed8dff076f
font_03_sfnt_off0001b522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B522 16680 bytes
SHA-256: 3a7ba6b06d81bb2f2fa5e8041be7a32a661b1631bd5457e9ff3fd2e16c0435d5