Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd66b01c161907b6…

MALICIOUS

PDF

89.4 KB Created: 2021-09-05 15:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: cb0077b33c26b7689d7de0fb53d67be9 SHA-1: 5f405210e665297717fd8bb1b91b3d22540f5735 SHA-256: bd66b01c161907b60fdad36372dc473856086625031243e6ef659ab4b0ef4271
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3165

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://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/7045040bf194b488f23e7e3a112b4eb9/39407437137.pdf In PDF document text
    • http://gardensyellowcab.com/admin/images/file/31783974708.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ef119637c15f5c526a8e3f54fc374a4f/kunirodurosi.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/kedagesenij.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/5290594148.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/zisonoti.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/51469610181.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecb6b3048---60919693129.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3v3bmijs1l2k7r98pb0pmfst8a/ponigam.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c265d55e12e---25922857931.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/29049566391.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/bojabala.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/33575908617.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/13265375751.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zosinotem.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/84049533308.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202108281103467054.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/7606241374.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb4eae44fb---simamevuvaga.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960a7e577eb---74270498582.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e62e1b99169---nutabetudageve.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/97679447152.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d0a3cf15---67535867476.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87cf64d27---vikawafawu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=backwards+and+forwards+david+ball+pdf+free+downloadPDF link annotation
    • 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_off00010d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7A 10952 bytes
SHA-256: fe330a4d4c5bb220682bc21459a9bba52f8526c774d0eadd3677eb2fdf77b41c
font_01_sfnt_off000126dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DD 19456 bytes
SHA-256: 61bfb6716e021b018194236019ed3eb66680adde9a6c3affb3c0e91d70da4389

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