Malicious PDF — malware analysis report

Static analysis result for SHA-256 f123e84d75e8c200…

MALICIOUS

PDF

92.2 KB Created: 2021-07-29 20:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 397aa2bafd190e94cc031b96444ab2ad SHA-1: 5b08d282ce3f20c2910d6402fe1a5c1d2a62cfdb SHA-256: f123e84d75e8c2006d882d8f864bf012f7dc647f193e7f67c50b6bac1f3be97d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, consistent with phishing or malware distribution tactics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5238

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://pistant.ru/uplcv?utm_term=california+association+of+realtors+rental+form PDF link annotation
    • https://toppelletmachine.com/d/files/40167470923.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f9ebe0399---65751920803.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/56433274715.pdfIn PDF document text
    • https://agermag.ro/mm/file/87571605307.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607960c8159fc---55247792563.pdfIn PDF document text
    • https://vestol.bg/files/file/58543206144.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162310232161.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/jujodej.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983445117b1---63654634195.pdfIn PDF document text
    • http://klhl.com/userfiles/file/terujamagofew.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/fozag.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/danenozuf.pdfIn PDF document text
    • http://unseretochter.com/images/file/73071847077.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/68974598906.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a49999f38b5e32f2bcac49bf13afca2c/34568514771.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/zesozibur.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ff101c328---vamipilotatiluf.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a111a8ddfd1---kopeg.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/paxete.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160776df7913f6---galapubor.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160709d5f82f8f---gazudikifokaxenoj.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5a6e42dd---rixame.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/91510370288.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/75869159184.pdfIn PDF document text

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