Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7efa7597df4b67…

MALICIOUS

PDF

63.7 KB Created: 2021-09-11 17:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dcfd1a00816e246c639510aa96c80064 SHA-1: 6bffbd7eee03d253f38cbbd5d7596cfe8b3aa80e SHA-256: 4b7efa7597df4b671b8b46338b0dd3c15e33ca780c96697cbb39a07e312f387e
124 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, pointing to a PDF hosted on a suspicious domain. The embedded URLs and the nature of the PDF suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

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://retrolondontees.com/userfiles/file/remutulimivumapiwivop.pdf In PDF document text
    • http://freewest.at/36741177651.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/39441510283.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/67917742715.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109021223121233.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/nunitiwetagi.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/2128067636.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/95818646764.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/67431484424.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/nomem.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8f3e8a472---bugafopizokegorifodenaza.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/53248613490.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/sipanemotepikusibotet.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/89215897326.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/15124639490.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/72613370595.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/pasubigetugodu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613405b182c20---temajepobakowefaf.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/fadusowatewigigiwefatiwuz.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/falikamif.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/siwofalol.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/89090089508.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/xuguwibazinaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=android+crash+logs+locationPDF link annotation

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