Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3e8ab8bf9a27c7…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 04:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 135cf65468e7fc1e4510c635040f2373 SHA-1: 8ef4db16029d4c0f1eea41406c06d5ba5c014b60 SHA-256: fe3e8ab8bf9a27c719947ed0251390f7073efb6f530802111b27c3c2040b2b17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These URLs likely serve as lures for phishing or to host further malicious content. No scripts were extracted, but the presence of multiple external links and the high ML score indicate a strong intent to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=short+run+supply+curve+of+a+firm+under+perfect+competition PDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k9ves6raha4vgr71u9muv6oap5/momegojaduropug.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/45138468244.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a838064b3c8---bawuf.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/tavusebiwokisuraji.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/rafujubulusobodalifajuf.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/d3uu88pdl9gjn7lo3b8avqka7o/34440380113.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/5euespg54e7ll2t1gdbpak2fat/pulawakiperejevub.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d535ca9a61---52467727842.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202108051815118139.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/jezimamepakiwixipoxidiv.pdfIn PDF document text
    • https://guijek.com/userfiles/file/vekagoribewimati.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/vabogomolofotetimepuk.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210630221337.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/zewunozaxomupavoxofad.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951b9118f01---putebafavaxirokomawoxuba.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/f9bvcr7k9u8dcob93dp59e3for/bujakuto.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/45699689489.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/mubevabuxinilu.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/53876987740.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/7unm8ocrq42rogsktt9lquo1mv/mobefosupumarowasede.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051518460173499.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/48070615553.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/nanadosowubuzat.pdfIn PDF document text
    • http://islandpointfl.com/userimages/98266650717.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_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 16652 bytes
SHA-256: a2874ca5b48b185db8f516488b1a2401618143a87b7391c80133b1f815edbea2
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 11240 bytes
SHA-256: 7f17bebe7b23721a7f0800914339ddacbe4d0af6739bd6e65ced9a768e8620b2

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