Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed021f8490adb2…

MALICIOUS

PDF

62.3 KB Created: 2021-09-01 10:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 54e4196c6c7ec86d5f7ddf5c97695d44 SHA-1: f66988c2d9575cfb1517b2a2523c78c5dfdf3ab3 SHA-256: 09ed021f8490adb2ba095b4c03bc27c16b32f16d1bc388019a139136939838f7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggest a tactic of using compromised or disposable hosting for these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9355

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=moderate+ac+joint+arthropathy PDF link annotation
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/f16ad8465bdb237675ba430477dc077d/pemeperukudamivuvube.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b50cad4906---77281974685.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/somizasup.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/fb93ed7204fedab10d4fa001d59bae13/rowenuzesivu.pdfIn PDF document text
    • https://jetaime-shop.com/files/notajimomadonegokaz.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bce408a44df---39870388645.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/digazi.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/83901971199.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117c070f16a7---42414697961.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/87664024528.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f1b5d458---dotuzukepi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6b6a13ba34ac6c642501df963a95782e/76152270342.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/ninumamemafarij.pdfIn PDF document text
    • http://lalinpress.es/ckfinder/userfiles/files/28716713782.pdfIn PDF document text
    • https://maturana.cl/upload/file/52094516799.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/11397321598.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/88976286267.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/45684005667.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/zetifavupugekipewuxeza.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c17de527d9---19796433763.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/xebufakomumigoviruxifiva.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/34890028368.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/b7573ca1b448db672d9e680156b7809c/7314869415.pdfIn PDF document text

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