Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fdacc64670921b…

MALICIOUS

PDF

64.0 KB Created: 2021-09-03 21:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8601b3ba3e2c81595bb87db69891de51 SHA-1: 29252003b63b161c1f9ad90b523765361ba847e0 SHA-256: 63fdacc64670921b6f653be89cc922e254f3e463efd1a2b6dfe6212da52dece3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites acting as a link farm. This suggests the document is designed to trick users into clicking links that lead to further malicious content or downloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5583

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ventiliatoriai.lt/js/ckfinder/userfiles/files/moranirupusuvemoxesofub.pdf In PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/56796666010.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/ratologonob.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9efa7c3b3e---vuzuxonatadugi.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160835892c4309---zorowojedibebefajiguru.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096715720a82---zonijorevepu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609202bcf34ef---30406562658.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/612a39dcc1bd705890c0e5471477b75a/romidesiwutuvus.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/rjj3rfrddrtcbgh6oe763vfg56/68646588136.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/8032227934.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04911ce842---nozujekevalul.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/junusemem.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/fmc85s7nerk6ao759rc7uerop1/74921200612.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/jusibabelub.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071becb3e747---zovizibobutukunefidu.pdfIn PDF document text
    • http://scpt.it/userfiles/files/jerefelab.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/biwaguw.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/51269796399.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///zugizuvezawapuguwatug.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba7d1bc937---xujupa.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/55042394361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=descargar+el+camino+de+sherlock+libro+completo+pdfPDF link annotation

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