Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c1728c8137c19b…

MALICIOUS

PDF

47.6 KB Created: 2021-09-12 09:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bdd037ee38e7bae7dd77055d3a9c26e4 SHA-1: 84caec5e678e9c19bc5cd43363c3afdd03639d07 SHA-256: e2c1728c8137c19b8a6d163f28e1579d2ae36684c8f9a9d487077c45f094c248
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. The presence of 'utm_term' parameters in some URLs suggests an attempt at SEO manipulation or tracking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8030

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://nieruchomosciturystyczne.eu/files/file/62479584654.pdf In PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613000ea97502---24909656054.pdfIn PDF document text
    • https://ptogel2.com/contents/files/74534016457.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/petojebolanabeloxumumov.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/tekajizipuzi.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630870494.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/luwiviropulevukirudan.pdfIn PDF document text
    • http://rafaelokazakov.com/file/riduxef.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/3765932546.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/65632764469.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/gotufilogefajonoguj.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/43628545582.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/43484159292.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/jusinetewekis.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/46018111031.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/71903062819.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/31262256999.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6ac5524b---18141464277.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/38176990263.pdfIn PDF document text
    • http://tercovci.cz/files/file/junuduxozajezugilubogeb.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/xajisusodugupotaliv.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e7ca494a4---fijopa.pdfIn PDF document text
    • http://cpviettin.com/upload/files/wedesizimekikifizepusaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=watch+sports+on+firestick+freePDF link annotation

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