Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbfb50f2609c572…

MALICIOUS

PDF

48.0 KB Created: 2021-09-27 19:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3e9dcb4e907ef84a2202dde9e3f4844c SHA-1: 010ffae9800ef4b7b7f3d3c99964b881e7c338ab SHA-256: 9cbfb50f2609c5723fbe14b18b861ddff8649774a06f16cfe7001d02fa8da16c
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document designed as a lure, containing numerous links to external PDF files hosted on potentially disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and embedded links suggest a mechanism for redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5801

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 48 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://tns-china.cn/editor_upload_image/file/65388046229.pdf In PDF document text
    • http://mdknoodles.co/uploads/files/gejevudofatoramujejeluxa.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/zafusejugo.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/puzulazokivig.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/13732680157.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/mebivar.pdfIn PDF document text
    • http://iknow.pl/files/file/xapolulav.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/19282757083.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/tamurosobesut.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/xutur.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16146dca308a1b---dugab.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/68192449717.pdfIn PDF document text
    • http://metzlerranch.com/userimages/temawuwupajejagana.pdfIn PDF document text
    • http://rayanchem.com/d/files/29703077342.pdfIn PDF document text
    • http://konberdbio.com/upload/files/64180731003.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/33190347669.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/gelikorerofumolumekifi.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/73043673135.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/vejitoratilowuluwoke.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/642624055.pdfIn PDF document text
    • http://oris-am.com/editor_up/gakimiduxugokotizokomo.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614285d6d5008---93118349515.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/75591250148.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/dojomugefujavaguse.pdfIn PDF document text
    • https://medpressa.ru/files/file/vumopafokikatukubexuk.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-2/20210902093659618942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=shadow+fight+2+mod+titan+unlockedPDF link annotation

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