Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ed98f364947dbc…

MALICIOUS

PDF

58.6 KB Created: 2021-08-27 07:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 780fd0142d7aceb2514b5833690ae00e SHA-1: cc43a4cee096b31f4202aa305a6e2bf6d3605973 SHA-256: 82ed98f364947dbca35d4f3eca97d444a1da32e01bf2839fdd60b8f67c791674
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f4d50fe0a---80097622196.pdf In PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/91113758254.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/kmh8bfd1eugutufm622rrf3obb/19979116471.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/1192871065.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/72293209531.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e97bf27777a---36389104356.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/tunininajuvuwopilaru.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/fuzurutuj.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/2498620504.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6951173bf5---61151581399.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609e637b619a1---tunel.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/44127771873.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/7469933788.pdfIn PDF document text
    • http://vlajamo.cz/images/file/baxunixarojemulix.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5a1b1aae3485330047e20ed477f5b604/8408256255.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f5894ca9eb---silalubevaturixinurafif.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/6917386450.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/k1b05pm9kn7kfjk3dc3klfhp32/93225784455.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/47118006063.pdfIn PDF document text
    • https://pcetravel.com/files/file/97191492245.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/rovuvazubidejalunotonuda.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7o4i4nfmoopvck27f24hhh6cmh/85046073575.pdfIn PDF document text
    • https://argumentua.com/i/file/sugapokifotizisikuxijowe.pdfIn PDF document text
    • https://asken.as/bilder/file/80406811019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mod+menu+cod+mobile+androidPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f76a9a626fae52d3b25a28e2c9588b02/digusuvivujosibuxis.pdfIn PDF document text

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