Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e471196cb47f0b0…

MALICIOUS

PDF

92.9 KB Created: 2021-07-25 04:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0d88aca86dcd27f1b5bce219556f0fea SHA-1: 870df8c899a675e0146c10c77b99e6d6bb48532d SHA-256: 2e471196cb47f0b097c98753b59f18932202ebaac0011c7aca033b3804031b0f
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 a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links to compromised websites, suggesting a phishing or malware distribution campaign. The presence of multiple PDF link farm heuristics indicates an attempt to leverage SEO or compromised hosting for malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2c796a64bcd7cfcd98500bbdaa503c81/tizelixedinekuzuxataj.pdf In PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/60832b155270f3666c99f0f83dff4fec/30352630667.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986a9a5ed5f---jirobuwefedakoxasenitup.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cfbb6e9ac---71594129480.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/fexawavokowasalaxeriba.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/aefbc4fc52a5237cf4044faa7a36b77e/42724124026.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2740ddfba---44262519743.pdfIn PDF document text
    • https://lazerom.pro/media/file/fixekubenoderijuzerorof.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/30951838150.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb014eee51---tuseradovakodon.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/vodidunovuvoso.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/895e094705393329197b799dea62e207/25412575397.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/legedivub.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/nunivebevozogopizel.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702e3a93e32---38225393952.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/lefukuxetepulubazetezefo.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/fapavopuzeropato.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/70722919096.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1b08ca88c4ffcebfeb6acc2c9b83e097/4235368998.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/97630078409.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d42fcfdd4---39955729543.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/gidogumodam.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af7923a74cb---gepobuj.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/61368c108ae1eb749764ddc40f4cd285/71533504803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=notas+de+piano+canciones+cristianasPDF 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_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F85 17928 bytes
SHA-256: cbab759acebb993ea534f365e8098b989a2a45eb09e0cc5cd6c3ac12c66d067a
font_02_sfnt_off00014cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD7 10440 bytes
SHA-256: f23d16b230bcb76a23ddce5e663a197e7355e38de68daa783b7be067e9b8071e

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