Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b14fae7ec4f91f…

MALICIOUS

PDF

67.9 KB Created: 2021-08-13 06:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d99d94a440c8a67966405c0df005bc22 SHA-1: 75931dbd481160e29d4710229b1b0ce9a9b868cf SHA-256: c1b14fae7ec4f91f7493b7e8f5c8e285b5c34a5aa6aac07c49c2f7fe91094ced
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as a link farm hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were extracted, the presence of numerous unknown URLs suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

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://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14c8570c73---5468589091.pdf
    • http://autowagon.it/userfiles/files/zavinasuf.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590a94bf09---waxapexumexasedizeretuxu.pdf
    • http://suacona.com/clients/16856/File/63031041507.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/70986348894.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610a89a9d8137---94542596729.pdf
    • http://okwmd.com/upload/fckeditor/file/ladarir.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6e1e4ccd34c5867bc6f0a85fe24075df/48075158799.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0007058acf---jusagokowamirunikuget.pdf
    • http://inglewoodreunion.com/clients/68690/File/92106157238.pdf
    • https://asthasupermarket.com/userfiles/file/tilifinuxedisojumexatezaz.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/83762682662.pdf
    • http://hkalc.com/userfiles/65532085665.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/706p13a1antjf5h5jiu7ab1lh3/76727993837.pdf
    • http://szakkepzosiklos.hu/upload/file/mogudizifeki.pdf
    • https://atcotourismtravel.com/userfiles/file/jomipuvuziwikikebiboje.pdf
    • http://zbraneklapka.cz/ckfinder/userfiles/files/17452100250.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6df088329e---babuzipeferobilima.pdf
    • http://kbchina.de/upload/89022128370.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67124242852.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848cc47799c---pobewijutalupo.pdf
    • https://eyetracking.pl/userfiles/file/namusinenu.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096597fd3e5a---bojukoseguxikivujimuwenam.pdf
    • http://www.ez4parcel.net/upfile/files/2021/06/16/widenuxebokobutowiroma.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/djs9eqbnff9dl6qcimggtl6lrp/5513275776.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=proform+535x+treadmill+owner%27s+manual

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