Malicious PDF — malware analysis report

Static analysis result for SHA-256 560084bdd40e1af3…

MALICIOUS

PDF

72.5 KB Created: 2021-10-13 12:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9722af7fb7a5d98262fca5d598b8c931 SHA-1: 9b3fbc8a8724e3ef764060caca24ee8091df27d0 SHA-256: 560084bdd40e1af311bc49e2397508359c53ed5ca0509a1a02df3a0ed650ed81
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself does not contain readable content, but the heuristics and URLs strongly suggest it's a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fanti-fitness.pl/uploads/assets/file/39397834863.pdf In PDF document text
    • http://ballmillfactory.com/d/files/34150219079.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/pulisetexoz.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/lovoxidajomadozolu.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/a9e7ea510a743e047d1004ce65010272/zatelogurotatamupulinodel.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e643943269---95934437531.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/pavupemesemezudurujavetad.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/nuzazudusumixetikadalobep.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/kolevamatakopijimij.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/xixodizatojira.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/ropenemufovuloselizo.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/nutadufezivezabebojise.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613db10493dd9---81974136749.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/67428349340.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/jevijakuzomi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161584f383d429---jekawaxutekokidot.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021913950309296.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/g0l076q9vgm4nik6qnc5m9u291/jitanoreparaxupis.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/71597835304.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/64646508922.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dde727e8dd---95409008536.pdfIn PDF document text
    • http://nuuts.mn/uploads/assets/72618667483.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138e3aac7f72---2726160958.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/vowarifemaka.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/45421725370.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/tgwjJlsMqHc/uplcv?utm_term=communicable+and+non+communicable+diseases+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_off0000bbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD416 10852 bytes
SHA-256: 41b5774bfa03e8d59977ce7cd9b4b998ba7295bbdb04de4abad1bcda5e14b88e
font_02_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 15360 bytes
SHA-256: 8c6e3b74192ef68c495a3d913235418c8af5974503e89d2b23d9e7d9169a8503

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