Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b044c24c3b76ae5…

MALICIOUS

PDF

59.5 KB Created: 2021-09-24 11:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 073ec6b806f34059cbd98eaebedc56fd SHA-1: a54805827fc7bfe6eaa56e7ee2063ac49585c843 SHA-256: 6b044c24c3b76ae5709ac3face8860b5e7977651b80c94d37e220ecfd470b99a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

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.piramideidiomas.com/ckfinder/userfiles/files/33760207985.pdf In PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/56380387790.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/tovozozew.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/luwodofubibekebekukozot.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161485abe9299d---wonepobojomixekuxazodus.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/jalizesi.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/bulafuvikelevi.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/26574655761.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/legesumabopekup.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/buzirafofabew.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/48577869443.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/36989858952.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/76181639982.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/nutarapebem.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/89107275782.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/67420f7ae91da107227b79aafe12f596/75593030593.pdfIn PDF document text
    • https://shidoremicrosys.com/media/lodepiwe.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/19573027382.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/nuzupovovabirasop.pdfIn PDF document text
    • http://roocenter.ru/upload/file/93616190172.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/xefiwogarapenifulosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=can+you+view+wifi+password+on+androidPDF link annotation