Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ca2767ece52630…

MALICIOUS

PDF

69.1 KB Created: 2021-09-05 18:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3282408a1d31e854a69c1fda363942c6 SHA-1: 41b043491430174c719f9f2be45c5d644b00054a SHA-256: 50ca2767ece52630f4c644119d642f9d053615219ef3fb788472614e656cb133
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or serves as a phishing lure. The heuristics reveal it functions as a link farm, directing users to numerous compromised websites, some hosted on disposable domains or WordPress upload storage. These links are likely used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

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://cructi.ru/uplcv?utm_term=les+formes+de+phrases+pdf PDF link annotation
    • http://motivationandmomentum.net/ci/userfiles/files/483836364.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/rejetumidowuta.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4578f135ae809ff8e366a3f32b175af7/fabopujiwatowinuwaxes.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/40693769351.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f21675bb4f5152e1f85d5f0452922fc8/gexumivajet.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/xexegerajevi.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/kisakuwetizapovubupe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926cdd54b9b---5653404576.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a51c1827da---90867310572.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/rikh8orfk7i9prfun50avcubu2/gijazodaw.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f398f33c9c7---kepelifidirigasov.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/82632893191.pdfIn PDF document text
    • https://led7.ru/file/79929493000.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5b61bbdc1d4ccaff46fe88286da8b17f/99389364392.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/bk37j5q1i27jksa41fu95duv73/waluzene.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/44605365777.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/41508975839.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/jesidodegiwowig.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a0f9219eb---61859246330.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/58f8a39e9e2393a46d7874483cfed2bd/totidelafugakuromejaxa.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/90663179477.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d631608b62---39105993817.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/bamarazowokufi.pdfIn PDF document text

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