Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4003c1b4d62db90…

MALICIOUS

PDF

57.0 KB Created: 2021-09-07 18:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c175bb1a863ba6e9808861f90d1eeeb8 SHA-1: bdd6c493e99f63d6867204bb7ba13d3c1ed18f07 SHA-256: b4003c1b4d62db9041975f266251e4e2272a5d2c1c170032f8539986c46d5349
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and link farm nature strongly imply an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7374

Heuristics 5

  • 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.
  • 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://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a50de0996e6be0f32953c42fe7064b6a/vukexuratefufase.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/0a471c9eba60853328af04430b4e922c/xibup.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9b5a8079---duliboxiwewew.pdf
    • https://sinhadventure.com/uploads/file/jebafugazerapukimajebolob.pdf
    • https://aakritidigitals.com/userfiles/files/41067798146.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d10dc467b---bubenumexavekotetapa.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/aj65crha7oso1mbrkrsffkgrp0/25075744851.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/8fc2a63888edc00ff578a854448e8898/kinadub.pdf
    • https://butchercurnow.com/img/shop//contents/8889547977.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fa96de0a51b6faee3f8546d429ed1d6d/lusakedeturas.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/72091274208.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ed2b630c---fepetoxikemuda.pdf
    • http://www.perchegouet.com/ckfinder/userfiles/files/89007855746.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/9708577302.pdf
    • https://clubelsendero.com/img_pag/file/sibutetutit.p
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=xiaomi+mi+electric+scooter+pro+manual