Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fed875c0ef9391…

MALICIOUS

PDF

55.4 KB Created: 2021-09-18 12:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6fcfaefd5908c5ddc8c4fdf5c0837035 SHA-1: 1b2130a43a261843294d067c6e53b0d4d044afb3 SHA-256: c6fed875c0ef9391a46619b096f69d4d9b7683d311323f747b26fd1c2c3e9115
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also leverages a link farm with numerous URLs, including one pointing to 'emailreceptionist.net', suggesting an attempt to obscure the final destination and potentially lure users into a phishing or malware download scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9258

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://emailreceptionist.net/userfiles/file/87848685356.pdf In PDF document text
    • http://glassick.com/userfiles/file/67637848155.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/99587613711.pdfIn PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/jejilidef.pdfIn PDF document text
    • http://rjt1.org/upload/files/31652524892.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/finarejub.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/suronewifajotusos.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/17143611467.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/zominifilugojitavevi.pdfIn PDF document text
    • http://industrialdevices.in/uploads/65660137630.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/43492917732.pdfIn PDF document text
    • https://academiesutherland.com/userfiles/file/goviro.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/kapisuluravuweruka.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210907_CA9B7CD4102A6611.pdfIn PDF document text
    • http://amandamaitland.com/images/file/dakegenirijinatesopofod.pdfIn PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/1769379169.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161326ceb3f8c7---sufurenopepilile.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/kawosemevevisosorala.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/80922933893.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/78622074785.pdfIn PDF document text
    • http://clerus.hu/files/file/895844447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=vsd220+android+updatePDF link annotation

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