Malicious PDF — malware analysis report

Static analysis result for SHA-256 78341b4c3fcc7a40…

MALICIOUS

PDF

43.1 KB Created: 2021-08-18 01:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf9cae205187027df2e1d27d9306b27b SHA-1: 7bca2090386600a8fde9ac61cc6e8f75b39c1719 SHA-256: 78341b4c3fcc7a4067f3b614d411a6be26a847d8ae232d396d6a0fb914263985
174 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV. It employs a common phishing tactic by presenting itself as an image-only lure, likely to trick users into interacting with embedded links. The numerous external URIs point to compromised WordPress sites, suggesting a distribution network for malicious content. No scripts were extracted, but the presence of external links indicates a potential for downloading further payloads or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 43 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=smok+novo+3+user+manual+pdf PDF link annotation
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ccba5bdfd30b74ed0bc057d4d4a7f0ef/88406454042.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/tusebazavabimegutituf.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610e00166592f---43252847372.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/12670947197.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/056s6lk0tf35g3s6s7jm5cph4e/34652628396.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/15157611252.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/77474774800.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/68317173370.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c99e286cab61bb8eadd1a730f004d5bd/28705322374.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/25872358923.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/39639974818.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/kavezuja.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/oh25mrmmnss0s1c7udu2176imh/47594488943.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/delofazufanabisofa.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482a346e3c---xudukutul.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/d4mnrn10ot6c0h8ma0rnq7du97/14073660528.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/81623171509.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853ea709924---45159144234.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/rodonidevo.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/luxet.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0b903e4b8db49bf4d467fca29dcd7b62/mosebibejavasodar.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef5739490---480593598.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/u58aurm9cfgc7gphbld7u4v7mh/rabivepewotitaboj.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/wejunaxowuwizemusamuz.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111d1df39547---7182010277.pdfIn PDF document text

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