Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23c607df6ec8862…

MALICIOUS

PDF

109.3 KB Created: 2021-09-01 05:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe1d1affc66dc6695f5ab4b8314d0377 SHA-1: 359ed7fb0c6fb84fcdae6ef38f91c726e009f0cb SHA-256: b23c607df6ec886295caa9cdcf74eb9077a12f39645ed20f673eb78544c93c9b
154 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting it's designed to lure users to download further malicious content. The presence of multiple links on disposable hosting further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9009

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 http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c3c7168ec2---88803197501.pdf In PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae72e328e---wovositerew.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129448b74f4a---kopugi.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/rirazunen.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9549c1feb6---61562898824.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ai0gmor0duu07um2f0dg4g8kvc/15006816995.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/41984458670.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/25731125063.pdfIn PDF document text
    • http://mdtrend.hu/files/file/sijozakokegadifoxosokisa.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/nipikobawarunexurejuxiwuv.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/35706178360.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/ralumefawufasidapozepawo.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/1c83g1a0hur4invaonipt45rg3/jakoxirupaw.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/20421954348.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/jeposetaxanezitefofuba.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/1255366503.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16080ec26c8061---3142911236.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e002efa12---nomalirikozezemipudi.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/nogosijemarupimagofa.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/6be3cd9b831e19c8fbc0e5cc02e35690/vikakudapodotokofasibej.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/11150789977.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/93919358927.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/raverat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=logo+quiz+cars+answers+level+3PDF link annotation

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