Malicious PDF — malware analysis report

Static analysis result for SHA-256 8179ed49f0914490…

MALICIOUS

PDF

44.3 KB Created: 2021-09-19 22:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68729dce2f5a95e400daecb020eae74f SHA-1: 24ab49dc88ad143c4e7944072424a5c48cfcb9cd SHA-256: 8179ed49f091449088e9c70d4d11760a9654e78edebc20189b087da098dcc31c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable hosting domains. The document body is unreadable, but the presence of numerous links to potentially compromised WordPress upload directories and disposable hosting strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6548

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 farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hfnhsw.com/upload/files/42970139506.pdf In PDF document text
    • http://energo-winstal.pl/userfiles/file/67955399113.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/vebajesovoben.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/xedixokowinozidizizavore.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/nuvevajoradedigukizubi.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/vamugeridus.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/netufor.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413ce59c407---risudekeluzasig.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373fd1e1326---kunubi.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/20963169656140753742546.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/64616399759.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/30358806176.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/defimovufizawixopewad.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/35540829560.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/wotunitopugugobod.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/47384362866.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/mitizuwedixexuruvafomuwak.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wejafujavowi.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/87466398339.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/wumezofofosavurivikir.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/judamunas.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/71344989466.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/6351378891.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613cccc82fa8d---ratorumunuvizolatesejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+tv+vs+amazon+fire+tvPDF link annotation

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