Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4ff340da67a6bf…

MALICIOUS

PDF

63.7 KB Created: 2021-09-03 13:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdb2b61ce275c7094b445acf027f27eb SHA-1: ea886bc75f928b2cea8207a79f504e13c5fd5498 SHA-256: 7f4ff340da67a6bf92322f2a36c61405413de2d72dca44e684218c7bc517f385
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and link farm heuristics suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

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://coretry.ru/uplcv?utm_term=ghosts+n+goblins+nes+instruction+manual
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4cef58daae2394458f1e6f7db84a7826/duwanofibazuka.pdf
    • https://alshamiltrading.com/alshamilfiles/file/pakere.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/osgb99fi74ui3i7hlnvloqnv61/tolurokimexumigofu.pdf
    • http://onfireinteriors.com/userfiles/49071655795.pdf
    • http://jarosi.hu/files/file/28227385421.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/94894863992.pdf
    • http://gabortech.com/admin/file/wezowofinamajuwulumex.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610411a54dda6---75236424816.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/23898655274.pdf
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/10102579816.pdf
    • http://mitcostruttori.it/userfiles/files/11859367419.pdf
    • https://alzubidi.com/userfiles/files/77942372208.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/lodur.pdf
    • https://listapp.in/ci/userfiles/files/73996538775.pdf
    • http://argol-editions.fr/userfiles/file/gowovuwirurijitepad.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611acf9647615---xopimikazazenawi.pdf
    • https://thefertilizergranulator.com/d/files/41477491806.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7afb533875d8ef23471a9c50bab22350/70933293919.pdf
    • https://hobbypet.cz/files/file/18620344165.pdf
    • http://cbcom.eu/ressource/site-image/files/delubu.pdf
    • http://chocoenglish.com/_UploadFile/Images/file/7476466380.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lmghuu4q8ajl6hnqta4n5v66tt/gogofinatovugutakif.pdf
    • https://astdubai.co/userfiles/files/84107859046.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/oo06o3fdo4sdnibsdees06u96t/89316681038.pdf

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