Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c93db7ccb733c6e…

MALICIOUS

PDF

58.5 KB Created: 2021-09-05 13:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37859d93fe0e459ff3a6093a04e8186d SHA-1: 32cada8e715d964069553771cb2958650d3b0866 SHA-256: 1c93db7ccb733c6eee18c59dea83c00a6975fa2e7577265568ed0f25c0023433
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a downloader for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=history+and+rules+of+basketball+pdf PDF link annotation
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5fad662907f65e410edf8564ff4df17f/6447342757.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/foxinilova.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/jepenibop.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/luzetituxulififoxujes.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/d6dc63806faa50645e13b434376f6f46/gefejiz.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/daladezagaf.pdfIn PDF document text
    • https://razredna-nastava.net/files/vizuvewosobetuneroxofaj.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/27223008911.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/61be38f82390e137ef9d3be3f3983f96/55226932928.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/37117493729.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071cdaf472e9---79663542471.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/lukozofes.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/n90g4qoed4a1tvi7s4evlk5qg2/besofeverogekabajaxoji.pdfIn PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/21235247259.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/34709978970.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/66321761585.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/8584419464.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/3732064917.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/64259145242.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082d51a72394---79047745182.pdfIn PDF document text
    • https://adikkedua.com/contents/files/mokevep.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5919eff9f8de4fe41f3658422e030173/lukawebaraw.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725a688fc22---40028710245.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608819df4b4c6---84938950860.pdfIn PDF document text

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