Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc27a2deb09754b6…

MALICIOUS

PDF

100.1 KB Created: 2021-09-01 17:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1831f812399c9544e05b1f0fcd46c6f9 SHA-1: b0091af2bba2f38b7fbebd2e03f2ab2286e46051 SHA-256: bc27a2deb09754b6ba880fa59e4870b567a3685059ee6d7efc4a72a200bae313
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, many of which point to compromised WordPress sites. The ClamAV detection indicates this is a known phishing or trojan distribution mechanism. The file's structure and the presence of multiple external links suggest it is designed to lure users to malicious or compromised websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.1887

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://marosme.ro/hirek/file/51060128409.pdf In PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e0b4f7da2967c85d3afbf7eb655dafa3/fofoniwefeniv.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/84175206b0a1a807e6a6febcc946732e/nozaxupumorariga.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/dl2vsffcrkl50d8f7h8p4qudq2/54611612849.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/41590548827.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/35336111414.pdfIn PDF document text
    • http://ubest.ru/images/file/51715621670.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d4efb8d91---rulijuwigokefikunav.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/febekuzojo.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/80608090252.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/7c499efee0644314dd09e8cfef2ac68e/39420882202.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/zarotimol.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/u2arj8cep95s5phmgr11e5oll3/fefaduxekemataduko.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/92438275913.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/5fd07569d08827cc92c35c121b75a3c9/davekedojiputebezujunugu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92a9b9df6d---pakurakekafekot.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd9a2d46d8---62687878867.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe8ebac65---xatubevezaserularuruda.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/87643698580.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/nevebami.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/44baa73b1871774e31f527f6fffdaaf6/pagiraziliwuvawaloganade.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3c66ecef4f2dacba7c4c1dbcd7988f81/lenemilimoxuze.pdfIn PDF document text
    • http://stevis.cz/files/file/29792748513.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xinifesebivefidare.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/19783835563.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/9rotoo6ouls5o1t40v8a8r04o6/41916578337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=get+location+from+lat+longPDF 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_off000137d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D8 18772 bytes
SHA-256: 5b79f9b32507162a38b9d1392567bb1f3bfe0f565b1350e9ab66096592620a86
font_01_sfnt_off000169a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1