Malicious PDF — malware analysis report

Static analysis result for SHA-256 598f5afb9fc9062d…

MALICIOUS

PDF

66.4 KB Created: 2021-09-04 03:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f84bd5e5ba61e71d59c1105e0594e9cf SHA-1: 5f309cd08bf07e3d6eb6f5146f7cf7a57aa03e80 SHA-256: 598f5afb9fc9062d4b72ce7a1571a965191c4eb4178c61f4c9abf89f48ccf8e4
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm pointing to multiple websites, many of which are hosted on compromised WordPress installations. These links are likely intended to lure users into clicking them, potentially leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4667

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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16115fa85a150c---torejetovofej.pdf In PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/a31dd1ec887fa0b6eda20ff7e8ea0ac7/20545400582.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/tubemojunuvi.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/83c8b335b105bd86f51850a016f4a6b6/68702447082.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/dosizebe.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/35463643130.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/609bd9ead3a7570bac5655deb0a06ec1/59536559932.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/11374918503.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210821010534.pdfIn PDF document text
    • https://proxus.nl/file/rufeluzovexuw.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/1661706121.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/26647483213.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/gobakikimive.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/89129199203.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/sobuku.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/wetizapilugu.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/16924699150.pdfIn PDF document text
    • http://minhanh.com/files/28532884955.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/bojitotorav.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/bebux.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/85932095408.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/22905990916.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/71fa9e8f3e1cc65f6d000219aaf63d5e/99162366043.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/xepedezorivebaxeti.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/tunaf.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/3e33a491fb3f42884fff89d050b1f1fc/wakusaxagenunov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=prezi+download+as+pdfPDF link annotation

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