Malicious PDF — malware analysis report

Static analysis result for SHA-256 535c64853ddffeb3…

MALICIOUS

PDF

69.5 KB Created: 2021-08-20 06:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 67408d0486a296b7833b8988f498440e SHA-1: 46969ebf6820f267c323070755c38264465f0a71 SHA-256: 535c64853ddffeb323a08481c20b3d87095632f02cb84cce73d2c3209f695614
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8495

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 http://ip-golubev.ru/ckfinder/userfiles/files/74880358358.pdf In PDF document text
    • https://plasy.com/uploads/file/wobemefasutedapi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/up83q0jbb1ca278vmhtki5q9jo/39322485468.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099b005472cc---tatamovifa.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/jejapiresilaniw.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/6ae9220eebe1da3bade033c7917cd8d9/fufesizebemebipifezume.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f07ad9c37d4---42357669338.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9e68080d6605e0aca87e1ede40c118e7/59315375124.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3aef3521---14557763326.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/jebuporebabimobanekim.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/7nj2kll5gn7mfod2jgm95196n1/gozekin.pdfIn PDF document text
    • http://ahchala.com/img/file/kemuxirijunewagokenumo.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d6cc3f7c90bb8cae04f39bc2a6e7e8b9/gegodufekobawusa.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/44046590900.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/53519639880.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609765eb43662---werowidujip.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/posuxegalexenutifi.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/2016535968.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/57459026554.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/66024670277.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097b0c074feb---72159929506.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/jetirilad.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/10258018326.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/vafowakiwizukokenura.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/kazew.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/cjrvrhc6i59fk2lpcvpfk43uli/lakajizoboripijugebul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=fender+hot+rod+deluxe+weight+kgPDF link annotation

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