Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d68a8eef375bebf…

MALICIOUS

PDF

83.1 KB Created: 2021-06-10 12:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6f1e1c2b48942fd50e30cc6c22e90b4a SHA-1: e6bae9a13ea1b3be99b587764133bbd4a7e9a075 SHA-256: 1d68a8eef375bebf5bf1508c3851ef95068d29875a79a8f6dc997d301fbcef2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, exploiting the user's trust in document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=tera+yaar+defaulter+kaho+ya+kuch+bande+defaulter+takkar+gaye+song PDF link annotation
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8674f6a785d5a72d5fed3d7a68505808/rawexipov.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6756d8b41---79140364254.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5kcgkduuj0qt99rj830e3vivr5/jenezelazenirukitosufera.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921748647f0---55989277772.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7fb6a7c6b0fe6b14402430cbcd506ada/tarijebafexadudavote.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/95791213277.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/96295655455.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/748c4cb74c3035f0f35440a389fcbb82/32862528190.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/ad0abff16ee874d6b414a2a1bd1850f3/14235065574.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/874361f6ea47491b06e966ae9eb1c6c4/50694186580.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vsq6nvmnranl06vuqe4uhon7mj/xewizobofojawolubugokud.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/bc70585bd84353328cb81c01810a9b42/81053378506.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/3cbtkaq88cqqlv55lioa3r4d35/32513987502.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/xezipega.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/1khru86uglp78qe8aa0o95e4n6/siwepunupoj.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/e3edb005398462c06099e067637de13e/61858953308.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f48d66c3ff---vabowudomaxagama.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/95121689797.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/57ae6e224d7d540f8d2931d0740966b2/kagexumofi.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
    • 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_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 5540 bytes
SHA-256: ee466ade4e4ec8ec287eeece221e0b14611ec84161c07b50d8b849aef9d2735b
font_01_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 11340 bytes
SHA-256: a11f2a98fb0cef259069861951547ab0defe5d585a4fa2c96fe8c1d516e01ad1
font_02_sfnt_off000120ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CA 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed

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