Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b32da2ceee75564…

MALICIOUS

PDF

105.6 KB Created: 2021-03-18 13:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 08a0695bda0c3bdf6649eb970a871014 SHA-1: 2512fb926226c70ff2a4bf989cc0f541741f9bd3 SHA-256: 5b32da2ceee7556491c3a7b39955375b42f8e9babbed2c8941b9f3528740bd04
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=ost+www+search+drama PDF link annotation
    • https://cdn.sqhk.co/wodelaganav/rOhiACm/pepi_hospital_mod_apk_1._0._69.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/eFzhaoo/54768435118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fe076e2cdf2b.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/jhhjZhf/budopipadesifositam.pdfIn PDF document text
    • http://zuxenegobepejij.22web.org/movavi_video_editor_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_602e53690f18c.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/rvhdnhe/monster_city_fresno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444104/normal_5fe3be452ccf2.pdfIn PDF document text
    • https://cdn.sqhk.co/zuretagugaf/djagc0Q/wechat_apk_download_for_android_4._2._2.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/nJn8hhK/odd_eyes_rebellion_dragon_overlord_deviantart.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/gdgfsjg/puvulipeduwopafuweda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_5fd356e0c5c38.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/iiehihh/sotux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_603d44730f2e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_8f6c14574c70414a9ea79a87a5082d5a.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_a69ee9b5e7344739b76115ba84cf9f5b.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_35fc3f430aa84f5d8a3160e6fc9b502e.pdf?index=trueIn PDF document text
    • http://firulakaw.epizy.com/sofodosodavagexebesoromuz.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_fe5a9cbcc8094d92b23600e7770df2d7.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_e85516540bf4432e941ba7a90684fcf6.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_04680e24313c4d88a43afa6d96abdbfb.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_dcef08156b3f4a82b23c449c92c5bed7.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 26980 bytes
SHA-256: 051dc5fc306b7b67ecb5d9bda5cdb7289922f93df9e528259808128153722080
font_01_sfnt_off00014b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B75 5268 bytes
SHA-256: 86f2e9fa44197444ee10a5724de6f5e3f7b651a473d414108d83d6105f7a90c3
font_02_sfnt_off00015d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D41 11152 bytes
SHA-256: f8842b5a4387aab6fea4be6a2915b5c5a9f1852061bed6a505d412d4350e71d8
font_03_sfnt_off000183b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183B9 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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