Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a4bdd8b3aaffb3…

MALICIOUS

PDF

60.9 KB Created: 2021-09-12 09:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92b9ac7aa06af4c28ccb903f46876111 SHA-1: aa6d0899a654a8ccb9b2eb57a56151d1d7359925 SHA-256: 36a4bdd8b3aaffb366ba03a89dd4faffaf61b305cc8c34b53fd52b294f36b983
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a link farm on disposable hosting and compromised CMS upload storage further indicates a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6228

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://makaroma.fr/upload/file/84351343799.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613414d577209---29913089895.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/jiluxi.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/83952252660.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/15699515987.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/sodinonexesiwakudusijo.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///jisokorinomabifasarofezi.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/dexuvibipatesi.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/73919217264.pdfIn PDF document text
    • https://funbugs.ie/files/file/pimikoxetefu.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/vigabozawaxexajisorowokis.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109062145238349.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/67057322252.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/fevewumonanizasav.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/38f75ba57eaca7659cfe9fd117d5719e/38312775042.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/8180434d5650228499981db53c027fb9/jezifiner.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/zumoxew.pdfIn PDF document text
    • https://bczenekar.hu/files/file/24674811307.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/jexopiketedenamelozunebuk.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/karibepesu.pdfIn PDF document text
    • https://greenways.at/userfiles/file/malutaxafu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3bd2b70b8---nezogozifudagefedudikeli.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/refadexubuma.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/vomatasofomuneponekenolu.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/zuxinobeg.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/ririt.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=samsung+galaxy+young+duos+gt+s6312+games+free+downloadPDF link annotation

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