Malicious PDF — malware analysis report

Static analysis result for SHA-256 501667fefbfc0eb7…

MALICIOUS

PDF

51.5 KB Created: 2021-09-02 10:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 95fd8f9b11a663541c3a1ae1a1c223f9 SHA-1: f963b78ea0c96807e2106868a4f930961bdbc8b0 SHA-256: 501667fefbfc0eb70fd464ec826f7aafa5d69bec27f8df961460bec9a03305ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7126

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://ketchas.ru/uplcv?utm_term=harmful+chemicals+in+mosquito+repellent PDF link annotation
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0a19fc19---50397737142.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kbvb7cearmkri87hegu43c09r2/76757998083.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/178c00277777f10aada3f5931722d6c6/dilumujoxagajixalaxufe.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a797b9e0---79902015372.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/fapalekobarijuze.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9j13res4n74amoj00felqal7b5/vareputigasusajeber.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/70893487501.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079080aee045---31756718032.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160708c04d8e4e---15726806980.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f8aaac226---8134480661.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/4d1a20dd878edc36437c4a3181510ad5/36321604768.pdfIn PDF document text
    • https://zold-kommando.hu/files/8817752997.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210706064734.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/58640334543.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/825e5585cad14dc5dc657e225e15e6ca/zodiloburivusutolijixenog.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/46419615924.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/fiwokiwidosawap.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/c2t36m9brg0u3k4ihos790bmua/paforenawojuvivojew.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/wukowufelode.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210629215132429280.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/sefijulineb.pdfIn PDF document text

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