Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b49a810cde7b5ab…

MALICIOUS

PDF

84.2 KB Created: 2021-03-17 18:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5363f570a91c148a091855267401bbd6 SHA-1: e36734d0d75299422ec1501194060339e44b816f SHA-256: 1b49a810cde7b5ab3ee61972788bf56cdc095d541bcdf794bb4a348d413da228
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site designed to appear as a search result. This suggests a phishing or scam attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=imperialismo+en+africa+pdf PDF link annotation
    • https://cdn.sqhk.co/xeduwukaxusa/Qggjihi/amazon_prime_new_movie_releases.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/ntyFhjA/granny_run_game_play_online.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/17287225868.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/21b5efe.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/gfOTHic/dabemimiwubijusolaniweru.pdfIn PDF document text
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/rowejeder.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/hgdidlD/like_app_video_download_wapwon.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/5nhdnib/spider_stickman_dismounting_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidusagi.atwebpages.com/taxi_driver_translation_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/evermotion_archmodels_38.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/what_is_the_theme_of_the_fall_of_the_house_of_usher.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/nejuso.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/non-_defining_relative_clauses_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/nesidobegaruto.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/71497523448.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/the_second_great_awakening_reform_movements.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_f54eff69b02249cfa5b57e8d16637d9e.pdf?index=trueIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_90727904a556421a8cfdc9f1e2ae7b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/bladestorm_the_hundred_years_war_pc.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_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 5236 bytes
SHA-256: f417dc5bc901c07c054dc749641a2372496aaf42d80989a0b004bdb9e7cee592
font_01_sfnt_off00011c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 11840 bytes
SHA-256: 6d01d59e6c18c767a7b395bec508a900d56f2bf39efd0b281370074fed04004e

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