Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccf4f300be47854…

MALICIOUS

PDF

89.0 KB Created: 2021-09-18 06:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d70e4507f629c62d33f0837ccd3b54f9 SHA-1: 1208416e0ba126c1ac8326e2575184b690f85e62 SHA-256: 5ccf4f300be47854657bc2c8d8511f4782ed9ae44682f9709a322079458bd935
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable domains or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://drafthe.ru/uplcv?utm_term=best+sites+to+watch+movies+for+free+no+sign+up PDF link annotation
    • http://dobre-jaja.com/Upload/file/jexav.pdfIn PDF document text
    • http://scpt.it/userfiles/files/mitepixumugevogixodowe.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/nukete.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/86543208518.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109160336257297.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/kikutotimiremimewivi.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/66055076118.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/bikudubusumisolibim.pdfIn PDF document text
    • http://mq-water.net/upload/mulizuzogotabimap.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161406f86d4b7e---38481238903.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/naxejegogofo.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137dfac7ca86---sudejukupuzokobek.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b1f835f13---17754741128.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/74798048173.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/21542106688.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6abd362c17023f0a7f3e653b5a650fed/digotizuditutusutumibolut.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba779614aa---54262205039.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/97166962924.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/37175712265.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/daxegedavaf.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109180621197926.pdfIn PDF document text
    • 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_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 11188 bytes
SHA-256: 62af337d38a3b8ea2dce362c3d2749809eb0ac4029a6001c103481f36d757a6f
font_02_sfnt_off00012896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12896 17732 bytes
SHA-256: 38c9ae8106d70ae1eadf25e7762eb88835ee629479bd86d31bdc2288855ddb49