Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e14c8225f73fb3d…

MALICIOUS

PDF

84.4 KB Created: 2021-07-09 21:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8c751715d666ebed4a5eb3d5d8b6ee4 SHA-1: 7ccb3490011b4f6fbeaa064207b420d7155f72c9 SHA-256: 0e14c8225f73fb3d86115ce8c1776a710422e8757c7475142de4e3aaa48766ad
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbba5a123a---76561279528.pdf
    • https://binarbaidrealestate.com/public_html/userfiles/file/35980195186.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104291942547491.pdf
    • https://goodline.by/userfiles/file/vobuselelamumuw.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e28b6ab1f3cdf243db015a0b5ecde8d6/55020684813.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/05b6a69c926e9ff6c8d7bdd6519a7965/86600774930.pdf
    • https://nhadatonline24h.com/Images_upload/files/jopabefaravuvavanite.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/zevuxodopuxufuzugokufo.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ni5m1tns6589eg48e2m6eeig53/73280241604.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39df0880a---16172041823.pdf
    • http://mcutech.net/files/xivojutajo.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/p4gg7c4obgqejpm1oqnr84g34v/devemubip.pdf
    • http://roland-toys.eu/userfiles/file/15449913837.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/svrmrmuac3rej9pqu521sv7rgh/ramoje.pdf
    • https://floridainvestment.cz/files/file/vavizeranujezuxetato.pdf
    • http://alemotta.com/resources/original/file/10015174793.pdf
    • http://4grd.com/cmsimages/file/rekisowurevafapivapumewij.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8864fe864f---12757496294.pdf
    • http://antonellascarpittadesigner.it/userfiles/files/96825272377.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/712e7484dbc0948caa83ab748b8b4641/tafovobusavux.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba8594be12---66980150914.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/6mu2vum7o2f9p3fg3hr9e41j92/vorosazunajebosomuxiwo.pdf
    • https://ratco-hardware.com/Ups/files/xonipujumusuvemigetezi.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2bec7c187---fijilalekopo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=source+of+house+flies
    • 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_off0000e9c8.bin
9c2f6813c5cd2b2620e10bf0384865864a18f0dbe721a756464377bc5db4f399
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 16328 bytes
font_01_sfnt_off00011409.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11409 16792 bytes
font_02_sfnt_off00012c20.bin
ae795f47873b62c3fc4fa5e988e20cc3a2f265f58aae9f4fc0214eedac8aca12
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C20 10244 bytes