Malicious PDF — malware analysis report

Static analysis result for SHA-256 81651fa92ce74bdd…

MALICIOUS

PDF

62.3 KB Created: 2021-09-16 13:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22e69150067087b7590c5bd74360036d SHA-1: 12e2b265538b14bf72de4e0d7cae71dc73992777 SHA-256: 81651fa92ce74bddfc8821e6a90f58ae3fa1cb0a68d555016f574f3b1352e9db
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to external content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection as 'Pdf.Phishing.Trojan' suggest a phishing or malicious content delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5897

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161313905a671a---gugewijewit.pdf In PDF document text
    • http://lechioutdoor.com/userfiles/file/sofanimokoponururebejufa.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/sepili.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/vewosebidizonijabosugabu.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/350318675.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/tolufimenanilomuz.pdfIn PDF document text
    • http://yongqingtech.com/d/files/vulud.pdfIn PDF document text
    • http://christopherdallo.com/file/33637147360.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/74153718155.pdfIn PDF document text
    • https://decisionstogo.com/fck_image/file/wusiduwebolifovan.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/zaxugoxezapuwelakibug.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/93410967250.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/60918116912.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/sixoda.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/75344861948.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/dowofotusufitijetukesot.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a2c41f2a055dc1b2739c967e5e0e78c9/zifojofebibuvenod.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/gomupevovudusufapotifap.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/21414979526.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/48028891610.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/fubesazilo.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/kogozuxagu.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/lakuzijikokogetud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=gta+4+apk+and+obb+file+downloadPDF link annotation