Malicious PDF — malware analysis report

Static analysis result for SHA-256 8784ecef168136d3…

MALICIOUS

PDF

55.8 KB Created: 2021-09-15 18:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92744d9e032a62d4e99bf258024bc537 SHA-1: 20e52d326102a5420b5aff8a43fdf9157f8f4382 SHA-256: 8784ecef168136d3a78570d2b50fc2739a0f028c1bfb2ba09d6750e6b2008d4c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm used to obscure malicious destinations. The document body is heavily obfuscated, preventing a clear understanding of its immediate purpose, but the overall structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7241

Heuristics 4

  • 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.
  • 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 http://kingsap.com/file_media/file_image/file/buxamarabipazikafawifatu.pdf
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/revumarojinuxoxu.pdf
    • http://archiw.gbpopatowiec.pl/img/upload/files/42642036492.pdf
    • http://huthamcauquanggiap.com/upload/files/31391988913.pdf
    • http://uralteplostroy.ru/content/file/kojekafirufus.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/zatipilimavesibemedif.pdf
    • https://rmp-familienanzeigen.de/cms/files/8436450313.pdf
    • http://cheliabinsk.realxenon.ru/uploads/files/88409757946.pdf
    • https://theipbuzz.com/images/file/towefulofaraf.pdf
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/69032000108.pdf
    • https://mmagame.com/userfiles/file/boponote.pdf
    • https://madame-tina.com/ckfinder/userfiles/files/koxamipawip.pdf
    • http://www.oomewatersport.nl/upload/files/pagiwebatinupuku.pdf
    • https://heritran.vn/uploads/news_file/31354513782.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=kodi+cast+to+chromecast

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