Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7d2fc490fde05a…

MALICIOUS

PDF

74.8 KB Created: 2021-06-29 08:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d8ec52a6f4c2487d37ef0026dba18a54 SHA-1: 55872341bc7b831342e683367a176266c9ccf1c0 SHA-256: da7d2fc490fde05af4952fe05403b096a63a9340818045d5499e4cfa61dc129f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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://queure.ru/uplcv?utm_term=i+love+you+so+much+and+it+hurts+quotes PDF link annotation
    • http://j1medical.com/uploaded/file/30820970046.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/83098736940.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080752e9ebcb---66828255504.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/vonakuvelanisuver.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a21d330452---94953290951.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/aqhumehu3q0ionme18b8j04sc9/koravanezajalunakenewav.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/2b624c7689df09fb2fe6ab7b2f3112ac/gejupukububilam.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/tigezeguzew.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210605210502.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094a90760816---65096495895.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/99345518707.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce59ca5cf9---mefixofajowib.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/81546475716.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f91aa75856---fudixijija.pdfIn PDF document text
    • http://chapelguild.com/images/usr/53867614037.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/mefaluzukugojedalusuja.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070108f43200---vodola.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fujevekivelamugare.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/v9t29hvhg5ghmqp0v9mrcphtst/vexupefapijuza.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/jizutav.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/26be9bbf091204ff41501255524b281a/77785581094.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/5ca15182ef1241d13b4268878046a717/rogasu.pdfIn PDF document text
    • http://bociany.sk/media/file/sugiletedulelada.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/ledopigagivusotaja.pdfIn PDF document text

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