Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0f159fcc2dcb76…

MALICIOUS

PDF

51.1 KB Created: 2021-07-09 16:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe9f38becabcc5fc3deef8f563032074 SHA-1: f1af9bdeb4a7aaf7b49719ebbbd01a05296d9cf6 SHA-256: 1c0f159fcc2dcb760dc59dddaceedd163c73ba34a4675c5368138ccdcbf6dd8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to PDF files hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6843

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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9ed3eec11291d46ddf7898fbd7bb9933/13407554078.pdf In PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a27c7c819f---68185518046.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/debodajigikonojumot.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d9872b71---vamuwovu.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/tipigime.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a15ac3cfb---46910979822.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4f73bb360b8d6c09b1399705e18d2c05/10281748881.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a468515af1---89695708516.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c67ef63544---niwusijugapubuw.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/34558867646.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/wufuk.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/86219098300.pdfIn PDF document text
    • http://wamer.org/userfiles/file/lixifibonesufufusosem.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/mogunaf.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d7915d511---47020488643.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/85790258864.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb9aa5a6dd---fufil.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/47725bqthe1pqdjuu2m0jene35/50400339842.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606efde716982---47012162224.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/tukakokinudosinaxonumig.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27ea1d246f---30723964079.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add4445f12b---86047225377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=recycle+number+2PDF link annotation

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