Malicious PDF — malware analysis report

Static analysis result for SHA-256 d895fd103314c799…

MALICIOUS

PDF

95.6 KB Created: 2021-05-02 22:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af27bb7127835e24e3c90c3e11a7a5e2 SHA-1: 55973ee3a77456b5c3d857b6d6c54c532d1bbd37 SHA-256: d895fd103314c7993a372caba8316259a860e43207c0404afe14d851b6363c49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and numerous external links align with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7441

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://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/so6q6np6k77r30dmlkpkh1llp7/39141201879.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/eedd259f047c42e377b92b6fa04adeca/zufubot.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9e5ce94ac77147c3e5381fd485f5a29f/xakuwekibijadelo.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c6d80d8b76f0b2e7bd32ce70c0a2c2c1/18321975295.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/vqbb2opt9v212ere7cd6vf4duu/15978769334.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c7ddf876529094dfbbe6dcabfabeb6fa/36644734088.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/bf7e819e9b4887edfbd6809facd64ce4/33941213159.pdf
    • http://alexlunacoach.com/img/editor/file/zatamozunijo.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f39697b52---mezapafososazajulepaxuto.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086d678dc660---68892677594.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb53c6b53f---xezoledekodopizibasisi.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884f0a7e907---50836883694.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607afb5f28967---vijojumuromileta.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1d700eeccb15875dd2629f3f3e45db3d/lopufodaxesubu.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3af9bcba---69029544002.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/58mpv5scbk5mfrlmo465lc3fn6/46199712200.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=glencoe+health+chapter+2+assessment+answers

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