Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd40ed7553c9603…

MALICIOUS

PDF

70.6 KB Created: 2021-09-02 12:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3225b706aa1437819e0f0b89d9f4087 SHA-1: eb904e463826b512c53857aef93c15af624a323d SHA-256: 9dd40ed7553c9603071f916e3cc3e1394e40edb166dacec8941a9670a013efb4
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer, likely to facilitate further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

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 http://africanhairbraidingsalon.com/userfiles/file/44818985957.pdf In PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/fuxaxijefinapuxaxol.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161068ccb3645d---xumuziwifonogovulaleva.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/22812219808.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/202137271091.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/wudakufevafor.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87c9f00da---55841369011.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/27619426984.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/dexesezopuvofoze.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/6ebdb4d9ee8018dc2a73a67f5e1768a6/82484831871.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/87242711436.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/rebopasuvurirefusajid.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5e9a05d2d---51602810193.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6026cb9e---35449894486.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/rupeg.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/vujetigag.pdfIn PDF document text
    • http://kodemari.info/data/files/41726874778.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/tibarosojojofoxaridi.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/pematikojetonitowebivu.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/sefiraditeroma.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/36346077497.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/jaxepewigawepomojikinob.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/paloxawinisosinigewe.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/13187301901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=litotes+examples+pdfPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.