Malicious PDF — malware analysis report

Static analysis result for SHA-256 498e48bda4216ca3…

MALICIOUS

PDF

58.2 KB Created: 2021-08-21 11:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 99d98c37e190428e674cb1b3d288f85c SHA-1: 910456a4c02a155f0ca2e4fcd5adcd1213d57062 SHA-256: 498e48bda4216ca384234b8aaa49647ea7f2bb2d5128a80cdb9e216267075352
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential for JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

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://catamma.ru/uplcv?utm_term=fl+studio+mobile+apk+obb+data+download PDF link annotation
    • https://vannordenvastgoed.nl/userfiles/file/97977314495.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/90217654857.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7be37e747---34830627462.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ed6915bdd---42409324268.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/bekelupiwinajunuv.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cc1b289d0---5489587691.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/sozusunuwawadatajuwuj.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160805a0375f09---karalujeg.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/bawekuzuj.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a330eab0167---92028426153.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/25967549344.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6c00b68fee530f5fe08716fe8cda4459/vonajulubuwiteniku.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/zujejajuzixufu.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/gatovodaw.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb77569fd6b---67008598625.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd8eb058fd---jirilovi.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/0o79f891dh2oupm8falmq45r27/49297653528.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/gd5dvlcdhv5m4q4u0vujs17kso/46732175673.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d1e8ecdc---pexuf.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/ramosomeborulufurebaba.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/ziguxok.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/6475595306.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0645e50b7e---miripetupuvisutat.pdfIn PDF document text

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