Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e65c7d3ca2c93ce…

MALICIOUS

PDF

125.5 KB Created: 2021-06-29 14:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 3f68a9cefa3bb5db0271e9adfd83284a SHA-1: 812b3dc90ac19ba7afd522c18a54614b84da73c9 SHA-256: 6e65c7d3ca2c93ce74e66df74354a3869e5df3602cfffc4e1af242d6121b9453
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://smidgel.ru/uplcv?utm_term=fire+temple+ocarina+of+time PDF link annotation
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ju7fma88ua0s1b5fpio3h8vvn8/34137182386.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/529d91b846634d121e093ddd69270aea/63648203625.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/55152532358.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/52208298409.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e10e1e5b907b05f6524865204a05d00a/mulosatumexuguxo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a234dcc9cca---11839902605.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/174b5640511b2f2ceece576830cc34dd/88379478574.pdfIn PDF document text
    • http://dbhsreunion.com/clients/21010/File/71818758288.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/76dc71666c6b0e36e484835a99f1962d/71063071399.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/70ef4274cb338d8b56e81df4dd820c35/26470416238.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63efacc37e815ca5338477f895c72d16/68802887290.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/6e547c66bdb2b15584128f5bbc057c1e/nisuragakojo.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/3897575240963e7a7d611beff70f77ad/zamuberudejo.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a25d57c8c0622785369d844d9dce168f/16513804866.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/jibifipiriludikidojevinod.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/29cd588fc9afaa1dff28e4b5c4f36d66/77701859045.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/22540262802.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/nopobeguxawana.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/fa3329e8ef8ab9a871e814a52a5a4a13/lomogiwariguzevef.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/98914186037.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d508dca2---fugalapuzexagogexepazamo.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/16794365026.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_off00018de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A600 10448 bytes
SHA-256: 65dcc712feef33359603e5cdfbf2989a6e8dd485643adadf206ec674ef8f9c4f
font_02_sfnt_off0001bda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDA1 16720 bytes
SHA-256: 22902bd723042f28960cea6fdd879cc9653b2b35afb4e5be97eba6aaee12f424

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