Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ee3edbfbd0b7f2…

MALICIOUS

PDF

92.3 KB Created: 2021-08-17 00:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 005480e22fa1da8ee6ed2d33bceb3997 SHA-1: 81691bfc390b99fe3a6253ad14832af01c7aab0a SHA-256: 93ee3edbfbd0b7f279e7375914d26559b5334eadf6a4b699d07c02d2fcd73008
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://oniceh.ru/uplcv?utm_term=how+to+reset+predator+3500+generator PDF link annotation
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/0ab3780d659acd9632470e1f6525b3ac/vixojexedo.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/6069489758.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4495b4c5d5---7930632898.pdfIn PDF document text
    • http://4rrecycle.com/files/file/62104581056.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6d5d17531a19285c402b63a08d7da3f4/86942899081.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607364e000570---34206141144.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/81586428729.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/36313790783.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ed87c8a1975c5abda7145485acf6c216/kutuzejereraxuvunoze.pdfIn PDF document text
    • http://calliopegoodrich.com/clients/73417/File/puxakajobifupokivu.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16098c4fe3e501---feruxuvopebiwera.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607139cce5fb5---satoxi.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/tanonubi.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/60634207032.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/74881215181.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf035355b---6691717849.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8e924142---bumijojezi.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/53013551293.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/87744138256.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/tumur.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf91e0773---resafaja.pdfIn PDF document text
    • http://cjatkinson.com/userimages/sokexejozazijagapakaf.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/wamowiverug.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/tataxonibur.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0757d8c76e---dipagobex.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/vugoxuxewakadedodakariso.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_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 17628 bytes
SHA-256: 7f046228860b939813e31a986a9f2dc8bbd4d1cd7490fd2b79a0611d1c85d609
font_02_sfnt_off00014a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0D 10932 bytes
SHA-256: bd7ce45bc8db58bd98b4f84a8fb9c330d6496cfc80a3d35c03b41de62f58e60e

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