Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7c49372965a6e1…

MALICIOUS

PDF

64.0 KB Created: 2021-06-20 16:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69340ccd9cb82a66bb1965255c632f25 SHA-1: b4a9efbffe89713b925d76dc176e353aaa880886 SHA-256: 3f7c49372965a6e1f85d83a9effab535fa529e64d523ebd13de0f94fe9bdfa7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Kodi latest version 2021', likely a lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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://blugarden.eu/file/46731592571.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a70a12b202fc7e7acac37c25977a2a85/46995338581.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/612dc114c39849b6f45fd743ed595cec/79158767756.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/1h2i5qoekh7q6d6rklvmevfula/34236571628.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/l54dpdt8so5hj5j926g6mmci8o/diwukadibedixalevev.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/1rsf92js4odkoovfp48ll37dqs/61384161430.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a709859f5f0---bevizovuvuwififudapusaxud.pdf
    • http://isgsrl.it/images/file/22569264456.pdf
    • http://sevimticaret.net/userfiles/file/40942132423.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9abaf0525---zakudepujap.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16094911f6a155---puvivilavavubukezinetu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c50464204f1---wasuvaxomikak.pdf
    • https://prosaison.fr/userfiles/files/goxumixomomizezufabida.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/c66cb138c57bbcbc87f19c999e957e66/98153872961.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6254290be3f22880d06e57b99740ff5d/fiporuwutebowaret.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=kodi+latest+version+2021
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04b.bin
332bd20e2701c301a7106d118e9a68d8bcc91ed8a876054f2f3bd79f4df65c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 5172 bytes

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