Malicious PDF — malware analysis report

Static analysis result for SHA-256 7261f2461f8d5b2b…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 16:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1b230b971069802bfebe10bd372e50d3 SHA-1: 9d99e2d987b5795f7ed218142caa4b7adef4f970 SHA-256: 7261f2461f8d5b2b082c42b01921e098587256b72dcea015741a790adfb64ed8
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads. These links point to other PDF files, suggesting a chain of redirection designed to obscure the ultimate malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://duext.com/wp-content/plugins/super-forms/uploads/php/files/8b3ce2f827afc0435eaf1fc4ab0bd87e/luwazas.pdf In PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105bc08c0cc8---nenemixewuzikataboxif.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/zepimeg.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/78298301788.pdfIn PDF document text
    • https://cakkue.com/contents/files/93784457330.pdfIn PDF document text
    • http://proxima-design.cz/files/file/matefudefasinanoxunolib.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/kopumopod.pdfIn PDF document text
    • https://soechi.com/userfiles/file/maderenadim.pdfIn PDF document text
    • http://northcity.rs/slike/files/pojebasuv.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/7428530911.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/31aade014e8ea56a34835539532a21cc/jabavujupubivatomakakotit.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d0d3474392ee78d75ff31a793d414a44/27572446006.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7d0d0f213d4bece0f2246d2c4bd74baa/27968320037.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64ffc0a9df---maramefapogodazunozawumi.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607540e3dd0b1---gofovelitaliluvigazulapul.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d018ab526f---xipitexepuluvinor.pdfIn PDF document text
    • http://elitvorota.ru/f/file/2847452594.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/taxakuxanuburupulenata.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/93637656269.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mai8raug4eufke67rlmtd6fum1/46623045119.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/80682401485.pdfIn PDF document text
    • http://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/82305942904.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126d873516d3---vexagodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=misonix+bonescalpel+pdfPDF 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_off0000e86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 18160 bytes
SHA-256: 379e3be552c4655e2bbd0b16747853a39d3eca876437cf6d71bfb4a95758d7e7
font_01_sfnt_off00011786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11786 10652 bytes
SHA-256: 9395a4b046ccd991ed8468e99d2f94724097d0f9723cf6a2d267717996af2c1f
font_02_sfnt_off00012fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.