Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfe59c37d211ff7…

MALICIOUS

PDF

38.6 KB Created: 2021-08-06 19:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03223d9fd249b3c953bc18c58feec457 SHA-1: 3803ad7478f005eb83654800c3b21cd78b2b3550 SHA-256: 3bfe59c37d211ff7f08120ec10a2cdda685abb14b6629a4510324aff3d85263a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to potentially compromised websites. The heuristic firings indicate it's designed to trick users into clicking through to external resources. While no scripts were explicitly extracted, the structure and URL patterns suggest it's part of a phishing campaign, likely using embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://rudolphalexander.com/uploads/files/87427950790.pdf
    • https://synersys.fr/contenu/file/17246991546.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc4d1daa925---jevusoruxumanuvava.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61b234162d---75672170216.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-3/20210503010906318619.pdf
    • http://villa-carlshorst.de/sites/default/files/file/jugudanef.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160abb8fc90be3---66456675826.pdf
    • https://medsplus.us/admin/images/file/76051820792.pdf
    • http://architettosirocco.it/userfiles/files/63918769184.pdf
    • https://kingcarmotorista.net/uploads/files/62985885999.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610c4dcd88506---4347611118.pdf
    • http://josephlillianmorrisfamily.com/clients/59960/File/79879804765.pdf
    • http://familiehollander.nl/images/uploadedimages/file/waturo.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/q4o6sbt5hv1699ohfel291q355/gibarupapa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=actividades+de+verbos+irregulares+en+ingles+para+imprimir

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