Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31d7fda47e4dc41…

MALICIOUS

PDF

55.3 KB Created: 2021-09-18 12:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f148be030f4f0bdde50d4a7b6cd7f93c SHA-1: 0c86d915ba7f39e65c9079401a7b1be998ead5c3 SHA-256: d31d7fda47e4dc41ec75275f997306d3a41716135202130d45af8d553fb51be1
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7719

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 https://leo.tw/upload/ckeditor/files/81619861546.pdf In PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30257880087.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/48011704491.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/59574053797.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/18274308214.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/41407414783.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/wenalironefuresaxumewu.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/kebotenoxitajake.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/nofax.pdfIn PDF document text
    • http://www.pilartangguh.com/file/7707483872.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/33981554013.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/vuzewofiger.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/39558740593.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/vajotowonizemug.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/lizadev.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kokovedi.pdfIn PDF document text
    • http://medigroupvn.com/upload/files/91269069515.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/torexigufakev.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1fa1aa386---91970276093.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/83888293611.pdfIn PDF document text
    • http://chargooshads.com/images/upload/files/81410976544.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/54994505506.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/xeribe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=enclaver+life+simulator+androidPDF link annotation