Malicious PDF — malware analysis report

Static analysis result for SHA-256 5579d965efa9f521…

MALICIOUS

PDF

56.7 KB Created: 2021-06-09 14:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c18dfe8fea7765d65387f874581cd1f5 SHA-1: 273d7b2573482be9c4775a527d75fc01d887df2b SHA-256: 5579d965efa9f521e0c4e01ab70170c56dd7bab996fce8638aec38eb2c69dd98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

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://inwebjor.ru/uplcv?utm_term=tofazzal+waz+audio+mp3 PDF link annotation
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b483bb08e35---tesujalosidipiraxopos.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/4a76484c4ed45adf75a302641b2b5125/wekosidamepin.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a0540c19ec0449babc939059a9601e98/lopobiva.pdfIn PDF document text
    • https://luminex.pl/upload/file/fofagaweda.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1562fbca57eac5da1ad1f56fb1fd4061/xenetomaxamazenetatolo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce3657a37c---29984681384.pdfIn PDF document text
    • http://sns.hu/_user/file/zivuzusefosebosok.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/d372e6234538d52bdc9ae6930701d805/gumuzijufijipotirobo.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/12008419761.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/lutukotarudulixinudimej.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b852c223166---18714179929.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/e8es5snvnvmisdlng1r01od6mf/46213030067.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a50eeea55d8---94422867249.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/co8ea1td24urdaltk12s20v641/82662687874.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/3348ddf5babeb466d22d047bc6cfbdb0/96319587841.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/46a60951136dd1ad1aa8eb428916d914/noxaxogexiresiruv.pdfIn PDF document text

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