Malicious PDF — malware analysis report

Static analysis result for SHA-256 78016e0714def0b5…

MALICIOUS

PDF

55.7 KB Created: 2021-09-10 07:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6532ec217bfdeaf148427ccdaed0cbb0 SHA-1: 6412f1a3082d7e41905d912ae39719874a2e6863 SHA-256: 78016e0714def0b5968c5fd5bd95c3ed750e77cf60b142e77f467798803b29f5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable hosting, further supporting this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6099

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 https://krisoc.ru/uplcv?utm_term=pdf+free+download+full+version
    • http://studiobaldizzone.com/userfiles/files/29277686217.pdf
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/50093324747.pdf
    • http://cokhiminhhien.com/media/ftp/file/22746191807.pdf
    • https://dukupahit.com/contents/files/lidapopixusijitafolepe.pdf
    • http://hyeminshop.com/DATA/files/dapogekoxafu.pdf
    • http://heorungminhphat.com/luutru/files/31541597807.pdf
    • http://prestopc.it/upload/file/dezupa.pdf
    • https://ganport.pl/userfiles/file/teruvosasupozines.pdf
    • http://miet-boot.ch/images/uploadedimages/file/57345877492.pdf
    • https://gonguyenkhoi.vn/upload/files/23403236644.pdf
    • http://aesg2edcv.handylover.com/upload/files/nubejedokalawozuju.pdf
    • http://nprofit.hk/userfiles/91427005448.pdf
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/43253200204.pdf
    • http://matchonusa.com/uploads/files/bidogisakoboxami.pdf
    • http://foodzipo.com/uploads/userfiles/files/50375958148.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/03pe5ajq8v3jk15dkq8bhpihai/nikupum.pdf
    • http://grandinhr.eu/images/user/file/bosijix.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d2098038a---wixofazenuzesomanitu.pdf
    • https://autosaloncenter.com/uploads/files/18312997195.pdf
    • http://huarui-bio.com/upload/files/sokutotuweguzaselapiro.pdf
    • https://liepasmuiza.lv/userfiles/library/20715696498.pdf
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/zelegebaz.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/30027727273.pdf

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