Malicious PDF — malware analysis report

Static analysis result for SHA-256 577d6cef8094202b…

MALICIOUS

PDF

70.7 KB Created: 2021-08-19 21:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a033f217f761d296a052d13b004881db SHA-1: 1efbaba36c8664ed604d89a610fbb69c56c8acb1 SHA-256: 577d6cef8094202babe3dd7b36f4e73ee072ca9e560e31b577d5983ebc1644c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by a machine learning classifier as malicious. It contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF link farm heuristics indicates a deliberate attempt to obscure the final destination and potentially distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

Heuristics 5

  • 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.
  • 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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b2cb9f6992ec391346fb496f1b9cf84c/52462761483.pdf In PDF document text
    • http://vtvxm.vn/userfiles/file/vogataramejevezo.pdfIn PDF document text
    • http://deasreunion.com/clients/860224/File/57031435906.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/vuzojumabik.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nlicq4ttm3ph64ncnicc8i4r94/53323868006.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cabbe8c578---rumabu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e9bda1ed4.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8fueonpr7dg1tppslc2kg8oqo5/dikubekazi.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/tivurukotozegaxurowut.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/89d650e39ed7c3cc3a36931d134a04e3/pagox.pdfIn PDF document text
    • http://szwygs.com/upload/63798947559.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54cb05030b---wupasonibepilavetifuku.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/81046827761.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/85347858548.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/ritikezedos.pdfIn PDF document text
    • http://camwater.org/media/files/dafirum.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/dadopufakinuzajuvi.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160785ca868a1c---kafunovokawuf.pdfIn PDF document text
    • https://epiphanych.com/images/file/20366736882.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/rodakubeseboxelanajizej.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1eede9ee5---pegatamebovobomaropuvusi.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/rafanuxurunil.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/zabuwajupapexatetojate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=3d+shapes+worksheets+2nd+gradePDF link annotation

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