Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbe869013dc5788…

MALICIOUS

PDF

49.5 KB Created: 2021-10-07 03:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cb4fd26f991fdd02a3334d4344155900 SHA-1: 2d49f524a0979bde001b9ae5c91391649dc744e8 SHA-256: 2cbe869013dc5788a0d99d0756302c0e3c28200429cbda77868a98bab65fd715
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to other PDF files, many hosted on compromised WordPress sites, suggesting a link farm designed to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4740cb4c6---kuduziveroxejope.pdf In PDF document text
    • http://ubestsports.com/imager/files/20210913031423.pdfIn PDF document text
    • http://ambulatorioveterinariovianello.eu/userfiles/files/zulijugavanorusutikotin.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/34787735535.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/40ff61f8c9ae937273dae1a42a0488fc/mogajuresukodopevifajoje.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/12605209277.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/0439fff35306a29adb40740ae072849e/42761341161.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/9240878895.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/34561160362.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/tawoxokudavisulamopubigug.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/luxalofajuxikolejepu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d624754b8b---tulafudafegutifid.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/76301305333.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/47246599462.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/72574794001.pdfIn PDF document text
    • https://ms01bet.net/contents/files/ganisatam.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/63508180837.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/203778066.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/rekogoluviwevubakojol.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/joledawolumizozanupaf.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5862a2e1140d97fb27859db0b98ead02/nojomilegovixutisiku.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/42312981041.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/bebuzelenexum.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/46393106615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kirby+right+back+at+ya+dedede%27s+raw+dealPDF link annotation

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