Malicious PDF — malware analysis report

Static analysis result for SHA-256 615e7cacad9fa3eb…

MALICIOUS

PDF

92.5 KB Created: 2021-06-25 23:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 76b82fad8f5e4845d3aa551c5ddd3170 SHA-1: 4757e396052a469995b69b863b926ef9f1181e22 SHA-256: 615e7cacad9fa3eb38a804b7b0b48bb2e5459c3e7fca8c4cc7643f6c560c76a0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45aa4de71f---31425609585.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fdf6af3564b56dd4ae42e2b43785c2cd/13108135152.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/19512639814.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081afd634341---kudasajobivewomigiw.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/91drglh8pa97eer7tdrf2phddj/tagujuzukuxonogubo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080065e981c1---walepe.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/04673fb70c1f86e847f779779b36398a/zezujezeto.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d4c0441a24bca27fdf44db9451848572/vogasexaxepat.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d839a6214---balaxagewemisok.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/64d8fcea246ec14677e11811cbd765b3/wavigumeb.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210615225853_8nih2c.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/boxulosojizefupa.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/lowokikarunexefenufol.pdfIn PDF document text
    • https://media-get.com/userfiles/files/56259939145.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/rejafadasufabebelu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e480b292f7---65767258024.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/7788667318.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c31492f13350cad3e26d3f9d5ebd8871/robiwulokovipudal.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b51632019---pisefedojivinet.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/figuzowudaxinexes.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/nupobenudesomefipovoge.pdfIn PDF document text
    • http://zae.me/datafiles/file/zeguniwer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sula+wine+price+in+rupeesPDF 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_off00010550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 17636 bytes
SHA-256: e70c2ad6533c85659511707b97f6555abde9b677a3c00abe3a7f86de76b9d777
font_02_sfnt_off00014b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B34 10412 bytes
SHA-256: be02d8282cb55d7b6c70bbfc79ae9cca6c1b702c1af37640c780652db7949509

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