Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fa55959efcfdbd…

MALICIOUS

PDF

45.7 KB Created: 2021-09-26 02:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8494da8d667fd95355c8ac85c9eec905 SHA-1: 9318200f1584baa21c40a6c447ddefe20ebf3844 SHA-256: 75fa55959efcfdbd6548b9b920bb9948ed1f2f60278466579824944d34654d46
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, the document hosts a link farm with numerous external URLs, many hosted on compromised websites, suggesting an attempt to redirect users to malicious or phishing sites. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6520

Heuristics 6

  • 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.
  • 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 https://archism.ru/uplcv?utm_term=best+clash+of+clans+army+th9
    • http://smolninskayahotel.com/userfiles/file/zegum.pdf
    • http://ipceurope.com/assets/file/96179830138.pdf
    • https://linkevicius.com/upload/galery/file/21589871673.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21044019992.pdf
    • https://uat-tunisia.com/userfiles/file/nexelepigogokivazudibexa.pdf
    • https://turismopontevedra.com/ckfinder/userfiles/files/zofexabi.pdf
    • http://ebbers-schilderwerken.nl/uploads/files/gitaj.pdf
    • https://sanaspinler.com/calisma2/files/uploads/xotir.pdf
    • http://thrifty-uy.com/files/others/22220874109.pdf
    • https://adepotcustom.com/UploadFiles/file/20210904021912161.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16144927037d69---61375829095.pdf
    • http://noospc.ru/SITE/files/editor/file/99127276061.pdf
    • http://dansungsala.com/uploads/files/37402488624.pdf
    • http://hajnysport.cz/FCK_userfiles/file/600151809.pdf
    • https://dobre-akce.cz/media/files/file/nipuvilikosenanumujavu.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148af6254c5d---17810879241.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614090a5b49a1---wozodopeginutuvevofolew.pdf
    • https://asoriofrio.org/ckfinder/userfiles/files/jokosafumazez.pdf
    • http://behtarinekhodetbash.com/files/files/25933863031.pdf
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/zolip.pdf
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/fexovuroveribidomisukeri.pdf
    • http://kelvista.lt/images/files/88175303828.pdf
    • http://kadh.kr/bobod/upload/file/mazemawelibafuwota.pdf
    • http://www.grupoaccs.net/ckfinder/userfiles/files/bolajipenufakibelufe.pdf

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