Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f940c7255b3a3ce…

MALICIOUS

PDF

46.8 KB Created: 2021-09-27 12:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38c8ff42fe48a815c9dd2979bb8fc479 SHA-1: 77fa11bbaa9c3fdf5503170eb13d104c383edf79 SHA-256: 5f940c7255b3a3ce87809230895f247c743992d61c12e1709bd31bd8188ba3b3
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high number of external links, suggesting a link farm designed to obscure the true destination. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6808

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
  • 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://print-resource.co.uk/ckfinder/userfiles/files/68737619170.pdf
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/fuxosopumonagojewofapev.pdf
    • http://2222.netsociality.com/upload/files/8641718033.pdf
    • http://kondicionery-shodnya.ru/upload_picture/file/zosebomuve.pdf
    • https://impulsa.mantareys.net/uploads/plantillas/files/74813509211.pdf
    • http://berbun.com/user_img/file/87806285882.pdf
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/80651068573.pdf
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/mitefaxij.pdf
    • https://lingchuanfloor.com/app/webroot/userfiles/files/binupipowudajezasa.pdf
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/82546344020.pdf
    • https://villatoscana-pi.it/userfiles/file/lurezulugik.pdf
    • http://teedinmaesai.com/user_img/file/78353386692.pdf
    • http://sbcnepal.com/images/file/libuwexesikibenireleb.pdf
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/xuvibesi.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/84316318828.pdf
    • https://hyosungulf.com/uploads/file/449032972.pdf
    • http://abwalabamaave.com/uploads/files/12893816850.pdf
    • https://bitree.ru/ckfinder/userfiles/files/wivalafarodez.pdf
    • http://mikailang.net/userfiles/file/20210906042938_327400010.pdf
    • http://randoquad72.fr/userfiles/file/safejilotev.pdf
    • https://gulf-rope.com/images/bulk_images/files/timipugipisuludebo.pdf
    • https://mysmartedu.com/uploadimages/files/31727842948.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/miganukodorefa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+phone+cleaner+apk

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