Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3a2d8f00f77e51…

MALICIOUS

PDF

62.5 KB Created: 2021-07-16 01:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f2b5f5c2a7645b310aacf7ed65d8dee0 SHA-1: 652968360fb05212c40f8c16a354b2819ee5b373 SHA-256: ac3a2d8f00f77e5181d5839a145ebfdb0117a405ca4bad9fe85db50c85ebc667
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to obscure the final malicious destination. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous links on disposable or compromised hosting indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d5i869nppa7v472fl7sco5o1c1/jimuvexos.pdf In PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2258d9650f---41968131793.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04442ad156---muwukago.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/1987835287.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/zafemebiwolusu.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f078fe82609---69642340402.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4itqtio4lsrt4fsft43oim9kp9/77380928101.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/12376335155.pdfIn PDF document text
    • http://intergeored.com/upload/File/xokakeje.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5f5ec1b7---87324818425.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094b60ca80ab---kafovojalanex.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aecf8c3250b---deremuxujud.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ilnt4v4faegbuqn86cj3r4sbk3/16127584510.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/vurijonab.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/39216540289.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/71874515648.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/woduwil.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18e57d4a7---muwuzinaworiti.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b440195bef9---67133066750.pdfIn PDF document text
    • https://ebooksweb.net/files/file/53095430290.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/befazisuzesudebozoz.pdfIn PDF document text
    • http://paliukenas.lt/i/File/5815729598.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6db2b3e9d---75427487959.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4d223dbd8---60537680902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sales+proposal+template+powerpointPDF link annotation

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