Malicious PDF — malware analysis report

Static analysis result for SHA-256 b240953f4f952c1b…

MALICIOUS

PDF

74.5 KB Created: 2021-09-18 08:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 210a92abaf1cc8d72136346dee8225db SHA-1: f060d71ba5d54ec43b49d2ddb6960565098ebae9 SHA-256: b240953f4f952c1b61efaad61e19e8b29be751b24478e11e36ae8fc2f0865f17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of link farms on disposable hosting and compromised CMS uploads further supports a malicious intent to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6968

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://synerhu.ru/uplcv?utm_term=frost+ancient+god+of+war PDF link annotation
    • https://dolupin.com/calisma2/files/uploads/lubowonanejotewamisupa.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/sqmi6khhv42h4a18d6sabms1qm/jamuwabisadupi.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/11352723087.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f92113f5ee17f97700ed032bc05e0c0b/bebemozologoverufiwuru.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/lapudal.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/subafowaxurixosaja.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f3427dd4c56c3618e6d4bb7df4b30b74/soseretonevejejafufu.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161304faf4fc4a---66550543228.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///repodo.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/44922308558.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/14d2a2f1b5bef37932f63fe99f818bbb/2476314176.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/fazibidesalos.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371122789a2---misukubasusonefek.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/zesumipusarezitaxo.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/47203379498.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/vuxaset.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/siwakidisarizenaga.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/xozebegujowe.pdfIn PDF document text
    • https://premiersuli.hu/files/files/rovuposufure.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/52028658258.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/82046431708.pdfIn PDF document text
    • https://asiapharma.la/files/files/30852002383.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_off0000d59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59B 10668 bytes
SHA-256: 38d243cc8c8623fd29d04c92dd7b6e994a7dd45aab6cdf8227c7a1124557ce81
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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