Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d9682940b0eaa6…

MALICIOUS

PDF

68.4 KB Created: 2021-09-03 00:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: d2978e68e8a490113d8d946d3bf5bb07 SHA-1: 577a1e7ce0a47f8a1eb59e35e3f835ed48a19896 SHA-256: 76d9682940b0eaa6f845ac285f048b61f24b5a7a04cbeb89b1cee37164d52832
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

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://wastran.ru/uplcv?utm_term=conversor+de+word+para+pdf+online+em+portugues PDF link annotation
    • http://qapoll.com/2015/vat/upload/files/88712744733.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/68010c35a8fa5919dc472c2777bf4d94/99006687663.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/latuw.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cb2364a26---64887619490.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/f9btgc553jv62vpbdnr7aqdlft/vomokulaza.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ddd87a409---tozademaxada.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dad1427075---letanezobuvitogovotej.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4e28f2018---kukebezuvumefetezixibepuf.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210712_EF2FC49D39075BF8.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/mikusiliditaxado.pdfIn PDF document text
    • https://samudra99.com/contents//files/58656589504.pdfIn PDF document text
    • http://stl-hk.net/userfiles/vufulesaro.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/14637514847.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/23397126421.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/guwif.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/sarubumapus.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202108142125533660.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8b9fc8d6c5d1b6a1f122adda11dde5be/11573236308.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/64a28b4be67c37be5545fb1f3d359ee0/55242785309.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/67052509775.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/12676130886.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f9dn710bqpojtv3nkbif9b16n/46628692892.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/64231349065.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e363c1059486ebc630848c14e7ee2dc9/18548076349.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/45688748812.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_off0000c5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F3 16420 bytes
SHA-256: 21e22000c8f50ec4df9806a6bc59112170a44c3c03239817201a9ebe599bcf39
font_01_sfnt_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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