Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf802f2cd6da144…

MALICIOUS

PDF

115.1 KB Created: 2021-09-23 17:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c60bd3216d2582e249eb46640e916c8a SHA-1: b812814f637effbf1cd68369daf88203dc87614e SHA-256: 9cf802f2cd6da1446299f9d38682e49646b39951e9de81b074f7197f17dd6ec0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3654

Heuristics 5

  • 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
  • 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://pixomot.ru/uplcv?utm_term=samsung+soundalive+apk PDF link annotation
    • https://sporyolu.com/resimler/files/toritedanabaw.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/76498440044.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/pinunuwufop.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/75034054114.pdfIn PDF document text
    • https://heureka-cz.eu/files/99049231612.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/dda9eabde1772a3d5a5484027c9c9cb5/51332491200.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/gepadureteponibe.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/bobinorepajapesaduj.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/63220665512.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/51580532156.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/40926675055.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/30038449822.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210917054740599.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16148afa422b25---85836747444.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210902_185121.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457406761b3---xamalupejezabelesulut.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/kegupogaligojetawopibudef.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/xotexaziw.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/nonenazunitaragapaxuse.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/tivemajegupujot.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/waposuxedetozogokaze.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/55452893708.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000182d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AEC 10868 bytes
SHA-256: 6eae3aa65f406074a2990d6ba7d5c01c6409281e017585fe1b2806f5078a759e

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