Malicious PDF — malware analysis report

Static analysis result for SHA-256 de05316e2fe201ca…

MALICIOUS

PDF

47.6 KB Created: 2021-09-14 06:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 553d3c91f7df508a28f039e6d4c59b4e SHA-1: 1fd011ae195a46b75811a7007646aeb2339e5ad2 SHA-256: de05316e2fe201ca588e9bb970a951de1071add89a5d66156b439642753b5aae
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a deliberate attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7102

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nordiskvillaventilation.dk/userfiles/file/solijebufilapoluk.pdf In PDF document text
    • http://ranchobg.com/img/file/53091703890.pdfIn PDF document text
    • http://4bx.pl/public/file/sogidez.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/18947658391.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/31333536373.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/58887525059.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/89313812013.pdfIn PDF document text
    • http://cssh.es/img/file/6642904932.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/bajefaxepazunitot.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/77630350223.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/22327846982.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/3185758706.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/lepepox.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/bizemozogivoluvilize.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/73004015696.pdfIn PDF document text
    • http://xmst.com.vn/app/webroot/uploads/files/nomubovikexutamerasuxa.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/73670032516.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/16890457279.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/34225967161.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/fubawazalexo.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/47655548860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=framelayout+overlapping+viewsPDF link annotation

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