Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff05674ed8cc53ca…

MALICIOUS

PDF

40.2 KB Created: 2021-08-28 15:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: e53c3c51c578b881f547bdf0c482a28b SHA-1: a5db3e89d615b96b60f895539150b8a7780a7750 SHA-256: ff05674ed8cc53cab61607807f58eb30d711aafd0d32342f3c0967f645dc8ea8
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9416

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://evrenmentese.com/upload/ckfinder/files/fimoxovuz.pdf In PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7uqbk47f1tr3j47aac6hfnd404/vuwoxolonuvuxinusidigom.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1rf5krsqfngk8ltoavrtte4131/jifagukugezujalopek.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/55863645726.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/9222190078.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/89609686860.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/89745539004.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/lotamolalumamerufofegopol.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/67ff8b12c09968ad16ed627d45c428e7/worinumafegukebefa.pdfIn PDF document text
    • http://imbirimbir.ru/files/suwododuzagisavafolo.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/megumegizimibibane.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c00342bb3---75055806258.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6ba79ba0a0c15f621f7dcf7325f467c/sejitafagetubutosal.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/c8464nu5j4mb6cj9rp61p7t33c/9481882636.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160982b7ac511c---43264070877.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/84613621490.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/tadenarobapulelatokiz.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501112758250008.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/64765187127.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/44814292806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=compassion+meaning+inPDF link annotation

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