Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba220e3b0a640fa5…

MALICIOUS

PDF

333.6 KB Created: 2021-06-29 03:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f88f6faa993e2d2eed26deef7827096c SHA-1: 648ff5630e060a10d1ce6f20cdb47008f910fca7 SHA-256: ba220e3b0a640fa54d6b6abf01e33f7dca6fa616c7d69cfa3883abbb06ecdd40
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host malicious files. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/59119cdd8bb79e9fa9faf9d9dbe192f2/xisoseveteduj.pdf In PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f5b786223---70191309247.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/migosavok.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bb4d6e43c16b34b6854ac92dabc26bce/52708220378.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076d576a0c2b---roboxigabazijivik.pdfIn PDF document text
    • http://tfforming.ru/d/files/88002317498.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/cffd9fad4ae70169cf39f28daf3b5f0f/57916756638.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210603041023_659189068.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105291106131172.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/tolefosemivuvupiv.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/kumaba.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/sotuzipumo.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/zafon.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/639e80106553fda9d62d2f10880e33a2/tevukedafukukas.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/9f38d29d06d870a6a6707b1d456f54d8/tajof.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/79785016482.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/r8j3fdhs0thmabclg4d1bq52qd/lobap.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/vutoxopefekatufede.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/gelakiwuba.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/59432016807.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/b7f1126357ff933877b768594aacb79a/sokamodomolegibuwasilojag.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/85925600846.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/jokuvesujuteguxipomufasi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083987d40029---51754499042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=celine+dion+if+walls+could+talk+mp3PDF link annotation
    • 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_off0004c12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C12F 19364 bytes
SHA-256: 82bde0ba9ce048bdc95a48e015db4e7c8c5c1c426a1634a5a7daa2594fd02393
font_01_sfnt_off0004f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F39B 11164 bytes
SHA-256: 9bc12acd94c2e3b97fa896ab40707a30412bd0cd9f7fc69898693f8477086168
font_02_sfnt_off00050dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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