Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1b899945aee733…

MALICIOUS

PDF

77.0 KB Created: 2021-03-28 01:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba45fcdf7d55f7015ee6e9c6fdfca820 SHA-1: 7be99a64bde380ec24572016f1096a31a28b9c8b SHA-256: 0e1b899945aee733d1dbb8ebac8e52e0e8b28b9a7266fe64d6d3f070b833ca2d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the embedded URLs, 'https://botokaw.ru/wix?keyword=final+fantasy+15+quests+guide', appears to be a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=final+fantasy+15+quests+guide
    • https://cdn.sqhk.co/gimanoretev/fDhgXhi/road_riot_apk_mod.pdf
    • https://cdn.sqhk.co/gifexajed/Jhhbigq/latest_virus_kill_for_android_1.pdf
    • http://ligumiju.iblogger.org/xedeguzozuxumiduje.pdf
    • https://cdn.sqhk.co/sitopizol/hbciggg/fighting_tiger_liberal_game_free_download_for_pc.pdf
    • https://cdn.sqhk.co/gevolonovare/ibpjchj/flower_garden_yoshi_s_island_mp3.pdf
    • https://cdn.sqhk.co/varipivokil/ZVggha7/chromosome_aberration.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9c6cb24d-db44-45d2-a8b3-f39300130061/percy_jackson_and_the_lightning_thief_book_full.pdf
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_833b77b932b24c108dca23fde23a78ba.pdf?index=true
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_19b7d02d771140df9dc08e0183c85e45.pdf?index=true
    • https://uploads.strikinglycdn.com/files/48f35e95-9706-42dc-b3d5-a90c21713b50/69009393858.pdf
    • https://uploads.strikinglycdn.com/files/fd73eca1-f6f7-4b7f-a778-6f71cd31ed66/jubugagepodoxaxoveb.pdf
    • https://07a970a6-a864-461d-ba0c-8deda34efc75.filesusr.com/ugd/b56c0d_517ac6b99cc642c8b704c02703723c08.pdf?index=true
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_fb5964ee775545c4bd38232a1bcb78e2.pdf?index=true
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9b821deebfa142b9b783d830b77bdf48.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cc3860b0-94fa-42b4-915e-26e8c2553f15/pafalimisibi.pdf
    • https://uploads.strikinglycdn.com/files/e25b3661-c6fe-487e-8fe0-e65aa909c738/thank_you_in_chinese_symbols.pdf
    • http://zijemuviwovo.rf.gd/bihar_board_online_admit_card_2020.pdf
    • https://uploads.strikinglycdn.com/files/1bc9647c-133d-4f03-9ca3-f2a633f181e9/the_5th_wave_chapter_4_summary.pdf
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_8ff7bd5feecf4cb08eca599c5038f8ea.pdf?index=true
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_271b60915eeb454697d06215f2718c01.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef08.bin
5ebfca1f153233217f5efd833eb6a2747e304158a77205885fd22922d00b94ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5340 bytes
font_01_sfnt_off00010158.bin
fb8b2a70b60de8782a232c835132b32e44a38ca104eebe74e8428cf07840a0b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 11040 bytes

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