Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba24f46dc1b477d…

MALICIOUS

PDF

58.1 KB Created: 2021-09-07 17:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 14f2a6a7e21c4a4ec6b9216aa8aa0f24 SHA-1: db256097da2f73ba1dc2e141e0b44f02c1003302 SHA-256: 0ba24f46dc1b477df6fd7f298cbc2b0a2df8db68d4f4f3b21e6026d616119eed
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. These links likely serve as redirects to phishing pages or malware download sites, as indicated by the ClamAV detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3715

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8384503e66---56412351205.pdf In PDF document text
    • http://technoauto.jp/js/upload/files/64827160205.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ddbfdccbd---42838005415.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/xatafatasa.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/41209490462.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/fawawisoxa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aa15622b2---40797025335.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/sajegejataf.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/36106177588.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/63575069830.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/posajopijijipa.pdfIn PDF document text
    • http://unsersohn.ch/images/file/33257329998.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/dc0a8e78d4789ba743d6d2ba4a299f36/najowepogel.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/vuderexawazisired.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/85725893256.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/33184268583.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1a84e29d3---69812317162.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/35175429659.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/69351901954.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113667357ee8---36876742072.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/guvawizuxabazopoludeku.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f38b61438---55724825991.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/bomozarifufokadi.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5a1b587dee98fdf26d2438bd5edb0f07/suxuzadixitizubaxeko.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/3147489938.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611a912529dde---19708060816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=english+stories+with+urdu+translation+pdfPDF link annotation

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