Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93e5176a1c07a75…

MALICIOUS

PDF

91.3 KB Created: 2021-06-14 16:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5f2c6b47093d45670523b4d10557b5f3 SHA-1: 7e11c4299215757f9dabb27644cc5d50d9487484 SHA-256: d93e5176a1c07a75466fe723d8870cf4a918e3a34917d64dbd594bac350fdc78
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document exhibits multiple high-risk heuristics indicating a lure for payment redirection and browser extension installation. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to deceive users into clicking links that could lead to credential theft or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://medvor.ru/uplcv?utm_term=what+is+a+cash+out+on+cash+app PDF link annotation
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c23f69199e---rukofomolupepunij.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/cce2d5563c41d6f4783ab5a54d145820/fakodaxarexubavened.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/46453736038.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/lomuxasigiselajebifub.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b8b56c145561d310faff6db2ac810190/kelamaji.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503025346373520.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/jiwebesozixavovo.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/3koc9374r6av8fu6ijdtbg2av1/45845228817.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/wopada.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/h9j2o5nec41tl3j2vlkkfihd07/komukoj.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16bd3a885e---58840495767.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05de05f49---61913792744.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/7bfc730c5e1e5b1df393daaf15b382dc/bufipolitikofojelubulota.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a033bca133---15974718267.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a17013b44---38574357796.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/238204e24c07bf00af293b365e5209c7/bozubomulawijenugobo.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/87429249270.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0671499f2---paxewidaxinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12891 4904 bytes
SHA-256: 37b8dbbf3651db2c939c02c2277060cb8614536ea09070b6be5b57ffa390fc81
font_01_sfnt_off00013953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13953 10788 bytes
SHA-256: 743ad2cf764e3361a55dc707e976fb096ab666879db330a285362df51a261127

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