Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee7cecfa5098214…

MALICIOUS

PDF

90.3 KB Created: 2021-06-29 16:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 032d606291992851a127d14bfb13306e SHA-1: d4ec63082640cba0148c161cda78ac5a076ba5b7 SHA-256: 2ee7cecfa5098214a8ae9475d8f324967e89c48f31a199372b37e445366f54c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The presence of numerous links to potentially malicious content suggests an attempt to lure users to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hnebgfdkp2pjfjmdqkas2g7sl2/57380192707.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/316l0lgbim769d2amj9c5v9oo1/80815683461.pdf
    • http://kosmonautika.ee/ckfinder/userfiles/files/63260235195.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5961235ec---83421229765.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ba2cb09090209d24fc82e0520c3c8b25/83682605715.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffe83f2c7f---73006080945.pdf
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/zevumuzonarefafumawe.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3b51ba9a---11696223795.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0e4f0c92---95658448378.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5872650e57---39195527359.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c70e765e81---kuruvidafinuj.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608119c5d2397---28541369045.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/np2srlq7reeqm73pf6r8squh1j/tekisumona.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f7952d027e03fb712f78338dca38ddd0/42489962408.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080b17007287---libesibelesoxigobegegot.pdf
    • http://beastyenergy.com/userfiles/file/88291903204.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/hu1pfp9gvb6fevrtmhu88gcb9p/91399578883.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/c79b12e0fa1544c2338cbba1e970194a/faxiwapizivewasiwumuvud.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/89f64eec8d337d0e800d90c761043f3e/57256391848.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mdu3he17o4b74t534asd46a925/dotelugiwon.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/5b8dc603b5d820da142ddd64c33d2c56/kevurinegetojar.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/92331609069.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005c55c69c---tilewunorirabalevaxaj.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/e3tkct83jdsnt3npoiqecckhra/wamuta.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=prayer+after+praise+and+worship
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010006.bin
9bc780c1cc6f05287b70a7e3e2fab7cb59a4a0a4582668e16b91ae71186d7840
pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 10748 bytes
font_01_sfnt_off000118c0.bin
2b71f66984b95c6206d27cd0744b4a7db4995242ce6ab98a0b068475f915f488
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C0 16732 bytes
font_02_sfnt_off000143f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x143F2 16792 bytes