Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef070385343c51b…

MALICIOUS

PDF

71.2 KB Created: 2021-09-09 16:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48ea970f248efbcc9d0a611b4346dc5d SHA-1: 80c86ee683e89bb5c5611d7d5b6b6a0f08a15e7a SHA-256: 1ef070385343c51b4efb3a71b1453accf7ee8a65f9d23cc3af11b76481a6bf3c
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3264

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://shidoremicrosys.com/media/jitarisumetinakuloribewer.pdf In PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/6390509515.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/warox.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/rumarigikexulebasimalijon.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/buzuxa.pdfIn PDF document text
    • http://planetamama.ru/files/file/4575023645.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613232aaf1c2c---39701121756.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/61200254138.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/buviga.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/76495542804.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161363bca80d80---64302951717.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/gibitiliruledulopogop.pdfIn PDF document text
    • http://didopack.com/files/nusililimozomuruwaxagaki.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/56548505310.pdfIn PDF document text
    • http://wawa757.com/uploads/files/77536872706.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/forob.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/61323977361.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/xufivuzozodiregesaw.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/58092366476.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/pavafilimi.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/kulini.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/goxazebilejimuwe.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/walanazosevasojogaza.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/zaporuwodonasekexuzuwar.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/zodafidakuzew.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/rudagejevunaliditebufuj.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/27852189605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=watch+game+of+thrones+season+1+freePDF link annotation

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