Malicious PDF — malware analysis report

Static analysis result for SHA-256 3345e16fba79217b…

MALICIOUS

PDF

56.8 KB Created: 2021-09-02 17:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b5c9b019b7b716bdf6765406f417a34 SHA-1: 8e18268a032efdde729643104878ebc1c0030e0e SHA-256: 3345e16fba79217b8321a8b886f77aee723fac88027668ff7e64c5f84ee7a383
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The file's structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6836

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=what+is+summative+evaluation+pdf
    • https://gulf-rope.com/images/bulk_images/files/26986007869.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dm74eeum5ludgbb7tvst5ojp45/34591906314.pdf
    • https://catbasailing.com/upload/fck/file/dewitiwofekemibiluvogog.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609edec877718---91711804783.pdf
    • https://oykufestivali.com/ckfinder/userfiles/files/ridepejarixi.pdf
    • http://rc-modeller.se/images/file///tafokejafujajevilib.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/bexegesisekewomemef.pdf
    • http://aite-materials.com/upfiles/file/19349311193.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc1950a3d---90076747474.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608b758ced54d---25326063383.pdf
    • https://swapnauraan.com/ckfinder/userfiles/files/72241808242.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16123806eeff27---kepupatupitetewososi.pdf
    • http://stattus.com/assets/file/19891476256.pdf
    • http://biometria.pl/photos_fck/file/nugixofax.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cuumd59n9mm9jvociu6d9ttss1/gemurufokeporifusaxesepi.pdf
    • http://moscowprice.com/content/xuploadimages/file/vozafam.pdf
    • http://stainless-faucet.com/uploads/htmlupload/files/femijujir.pdf
    • http://splogservice.ru/content/file/24446148365.pdf
    • http://palaciodelosnavas.com/userfiles/file/50619820522.pdf
    • http://vanillasky-ch.com/images/files/dikis.pdf
    • http://haustechnik-hagenauer.at/65970671067.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f2f962533e---15459372207.pdf

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