Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eea224e89402ef2…

MALICIOUS

PDF

91.1 KB Created: 2021-06-28 03:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d1368fcee5a9195f394123fd43a69432 SHA-1: 3e470aede6dbe0b665a2715496eaaf4135e9570a SHA-256: 7eea224e89402ef2fb330a97dbed0c81bb93b2b8c638700166932f306af9caa4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a link farm strategy, likely to distribute phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://philabc.ru/uplcv?utm_term=directions+to+dallas+texas PDF link annotation
    • https://hohsingfiber.com/ufiles/files/27760568089.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/6229946684.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/tatusogolipe.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d644b6ee05e---kiwavorikamuwaki.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/d1a33fcb3e3d27a32901713918f533db/jisimodetuxipigisu.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/37596996912.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/27ad538a88cd25ffaf3f8218c3ed95b2/gakubuxuzemek.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/a4s47tdl95mqcnbe87f24v5pb9/xumezobitoxug.pdfIn PDF document text
    • http://aweibel.com/Photo/file/wedumifupitobiwibebilogoj.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/n8ourc4temm2d6jhsb1j6j0cd6/gotodojariv.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1328653e93---59446574171.pdfIn PDF document text
    • http://carszana.com/image/upload/File/kagofiwigajijunak.pdfIn PDF document text
    • http://vswet.ru/f/mefegexevaluf.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/rivaxu.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/i3908hu9o6d8tn7hpjgeeib5on/82091290759.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/92023417840fce10dd61382cea723487/96371331403.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/27bc366bb71e5f7c4252c586b71eca59/45748264417.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/9f4cd3b8291c986907c5b191cbbcb222/sujegikozubojirutasis.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d4376d65d67---94387812856.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608473a390877---wonatatenudofopasi.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda66c1735---51329693796.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ef1afde9---xopukuxut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 16760 bytes
SHA-256: 3689ce65dac0ff3ee1956001c4557e35bc111f1d4be99729abedd7c6e34664d4
font_01_sfnt_off00012f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F44 10464 bytes
SHA-256: bd643d4c77d5903966e5d7915e87b3101debb19f77123d1f3cc1e4c40c1f0e7a
font_02_sfnt_off00014730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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