Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4e402093efdc2b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 23:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4992e17cfbdab5a3f8e7e38d9ea1644e SHA-1: 5737cc0d584ec130ed03f7efdfddf81cb7182fa3 SHA-256: 2d4e402093efdc2bcc098d7d48cefee38f207017b307a55e0cfdd666689a7b30
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/award?keyword=centrales+electricas+en+venezuela+pdf PDF link annotation
    • http://e-devletodeme.net/different_types_of_structured_productsckozz.pdfIn PDF document text
    • http://alisabor.design/nutupolebavupuyxb8i.pdfIn PDF document text
    • http://nicepics.xyz/59429439531rzx5s.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/iigeBgi/app_to_change_photo_background_color_download.pdfIn PDF document text
    • http://dutov.org/chelsea_fixtures_2020_20x96o4.pdfIn PDF document text
    • http://lagijiputofezak.22web.org/56807982743.pdfIn PDF document text
    • http://clipshd.design/permutation_and_combination_exercise_answers4gehf.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/nBEjhgf/world_map_wonders_and_landmarks_of_the_world.pdfIn PDF document text
    • http://copyright-notice-ig.com/bubble_bee_milk_tea_menuoc4t6.pdfIn PDF document text
    • http://sluzhba1.net/fufonujivosomufvuzy.pdfIn PDF document text
    • http://womenit.space/kashmir_university_official_website_date_sheet_2019o9hxr.pdfIn PDF document text
    • http://indital.fun/wasewunomubujugak8qal4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxatimax.rf.gd/virejosogi.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/zukalokuganumaneduxexataz.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/spelljammer_monstrous_compendium.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/65239471144.pdfIn PDF document text
    • http://gasezavixexiv.epizy.com/oracion_a_san_judas_tadeo_para_momentos_dificiles.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/bsnl_broadband_plan_change_application_format.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_31022f581bc048e4933bd21ae97a341b.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_041a611e341d4e398a20480ef1da1bed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/46381851955.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 5164 bytes
SHA-256: 76e3d7a5c7fa03151350b625188b0245e9ad9bdb22aefe94d436cde853eb7bce
font_01_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 13944 bytes
SHA-256: 2fb2add490405aa13506d0be57d4be9f4bb53f40c4b0e16a30043aef5f2b7b48

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