Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9925345fbd3ef0…

MALICIOUS

PDF

70.3 KB Created: 2021-09-02 09:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ff5bc67cfb1e509c7110c1854c3354c SHA-1: 583028e30022640a53f7773b3674cc9b49f957f8 SHA-256: 6c9925345fbd3ef0ef9f273db4b00c6529677b9155d5008a2e437028afcd02cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates an attempt to direct users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://catamma.ru/uplcv?utm_term=ancient+history+pdf+for+upsc PDF link annotation
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/bubebapolovesix.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d4bd596d---larimugopuwuludujubovo.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/87979875699.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7af25576a1---midojuvisiwinenubexodu.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/18226267869.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/xejunokefojamilikuwatemud.pdfIn PDF document text
    • http://wwstationery.com/files/file/jifovopijuposimuwi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ce7a3fa65---94957388620.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/tugap.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5701ec7efe---55903841196.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/50673827252.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/rarugikebemobarojidukod.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/87016878146.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/25752131067.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6a4c9f9ac62521de42c8eb70ef8bbbbb/palazubofowebazunes.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/75566306937.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/10c1190e5782176597245ea0c8ef5b97/kenojobolavekini.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/boxaxeta.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/semevg8ptcib3v02klmi8rpdbi/desuzeboserefefiraf.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/lodugefezegofed.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/75tplskdacbf7tml8envq427pj/43103341031.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe60e52844---89184338582.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33011d83e---xirejinufugojejutol.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.