Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0577ccff643d3c…

MALICIOUS

PDF

59.6 KB Created: 2021-09-20 08:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6297023f28c1bed5f2b1db308edaf854 SHA-1: 536c241d191b2870701480100f33b42947b422e2 SHA-256: 7e0577ccff643d3c6cdbc4d6f8f09079f84ab4f0af8507e7331d1ca485bfd574
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely to trick users into downloading further payloads. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

Heuristics 5

  • 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 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://goodmix-psc.com/userfiles/files/48541000686.pdf In PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/61275053984.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/pejove.pdfIn PDF document text
    • http://talleresjpg.es/img/file/95441630471.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/pupebusurekexid.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/nitejenulim.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/nubomipasokomilov.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/3a017b422871a3a93f59c132fa1703a3/50361768901.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/40905498734.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/38733896234.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/84390245270.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/ganukuf.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/91467413716.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/27326773143.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/buxovolus.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/wurotilepe.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/19170545059.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/73469735720.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///76058297072.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/51049145748.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/fusenibe.pdfIn PDF document text
    • http://stefani.cz/fck/file/77048203865.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/bivuwisigidepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=promo+codes+for+robux+heroPDF link annotation

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