Malicious PDF — malware analysis report

Static analysis result for SHA-256 45adde265b409d4e…

MALICIOUS

PDF

93.4 KB Created: 2021-08-07 12:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e967f1a3537fee8fbf4dbb2588da3792 SHA-1: 1df06e367000f3cb8648a9dfae50a83013690e15 SHA-256: 45adde265b409d4e4bb35935c3b5d31d1a1d77cc0619ec6dbc0f5151cee905ec
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/aa5d85f8a55b69fdaccdec6d7c38e909/dupabifut.pdf In PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080363602b10---juwoviwufimikadiken.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/wazipizewobubiduxavad.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/61a322ba3fae15e4ea7c20dcc0aab7cf/32776821342.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b8a2ac5d5adbdd295dce04574893b2a5/74652280272.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/fuvibubifo.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/dajinixuxi.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/46403839775.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/962c5d00a4cf591808cb392752f27ed9/nofakirazijesividamaw.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/jirowitedudikifipaji.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/59754931824.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082107105a4b---nenekunijuwij.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021080512164027.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/xisuwebilowame.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c50c324b99---84183515772.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82a813bb00---89854117114.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/ruwovufibime.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/dulawilixiri.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/91485092352.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7feac7d13---28737512201.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/97f3afd169248c1ebc9be203c243bc68/84397300311.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160805657df5ba---5086151323.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t5nqh8b2eo9q72o0o0far3lj0u/dedodorugufegojuxuvukika.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/wepazodufiribogoxu.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072061b8423b---lomozibiraxetivebo.pdfIn PDF document text
    • https://asi-filter.pl/files/file/ruduzab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=inventory+changer+csgo+freePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bdc0ca113cadceffda3cb3e7e4364335/41360609096.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_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 17748 bytes
SHA-256: f7b294d5091d33f03b73be4840d29db1ee0a77d703f4ef219616797c8d89c15c
font_01_sfnt_off00013631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13631 10608 bytes
SHA-256: f8be11b967f58e21d81c9d308fb1d48a5af4fd9f573f7b5f025be91215ccfa6e
font_02_sfnt_off00014e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1