Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27b33e7d60d5089…

MALICIOUS

PDF

126.0 KB Created: 2021-07-31 02:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: de9f2108e19f1b1f1bc7a46a102c97d6 SHA-1: 5d2e42c8e21f4dc2a29bf9fddd9080e327897f1d SHA-256: c27b33e7d60d50899e240b4f8da893f895195365b47a1b60b1b1f983e23d8b9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, acting as a link farm. These links are likely intended to redirect users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8732

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://wastran.ru/uplcv?utm_term=ws+5.3+combined+gas+law+answer+key PDF link annotation
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b88bf3d2cf5---87036253241.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/b965cd98b002707d0b2e994556645be1/liraguzolotesana.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/seropatifogi.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/rapujoxedula.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/fetedaman.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/4a2d67b9c6cc0fbdeb240bad0d0d9934/wuvakositemoxe.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/wigogizogeribetotidig.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/merefowalutumev.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/32692854717.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/kotujefizorejanunisediwox.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/caa8812a3a4c24e4ccaa33998707444e/tazijaxerewozazu.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/70ff2d7ce48c81a30f1f2588f38b2d70/bixepomibifexuzibanug.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc972ea7e6---dafilupotibenudomu.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/56141214575.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/limulopijesas.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/jipaluxuzomovokefe.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/74681338004.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2c6742b45---76563995604.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/64482249141.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072e2db6679f---66747648849.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/jetuwudalapodijaki.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/e896a3d4f4288d64d293b2dfd02d57ad/fafijezesulitenexof.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/duxoverixasifol.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa34d1ebce---20797186837.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/6826e31c74407b706dea5d263568fcd5/81294039982.pdfIn PDF document text

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