Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ee9c17d0dee549…

MALICIOUS

PDF

73.1 KB Created: 2021-02-23 02:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3d7c153a256ee863d80a949d1a65bfd1 SHA-1: cbed90d316a1632476347de4d66eec87b6d57266 SHA-256: 24ee9c17d0dee549604333bb4fbe218f13c0459ad5d20dd9fc9c2d2f25aaf85e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to 'jacksth.ru/wix?keyword=evolution+games+unblocked', suggesting a lure to a malicious site. The PDF's structure and the presence of many links on disposable hosting further support its role as a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jacksth.ru/wix?keyword=evolution+games+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422637/normal_6008a311651e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471083/normal_5fefb720adceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_601f6b382f629.pdfIn PDF document text
    • http://optamorem.com/the_queen_of_the_tearling_trilogyy4b82.pdfIn PDF document text
    • http://favovuzoxegavix.22web.org/chennai_tourism_information.pdfIn PDF document text
    • http://ziviludemedo.iblogger.org/65315858252.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/Yjb7gey/15542450461.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/Mjgjhii/rpg_character_generator_sprite.pdfIn PDF document text
    • http://gadosamu.iblogger.org/20524502589.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/gfrkjbU/96683445408.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/OibPxhg/zugimagusojalob.pdfIn PDF document text
    • http://cloudmarket.website/what_are_the_types_of_curriculummuwe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_5fea28ccc8d38.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/08JDqge/99420672931.pdfIn PDF document text
    • http://pajodumu.22web.org/golden_bc_fishing_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fakopasetiboni.rf.gd/novum_organum_english.pdfIn PDF document text
    • http://taputideletu.rf.gd/naruto_shippuden_game_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/zulotifulin.pdfIn PDF document text
    • http://kakununul.epizy.com/98629475732.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/tejizezupifabag.pdfIn PDF document text
    • http://kezijewuzal.epizy.com/what_is_the_best_motion_sensor_security_light.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 5264 bytes
SHA-256: 02f59420504be776787fc0d111cc97360a4f62b41f79e9a90620164256867ba4
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 10280 bytes
SHA-256: 5c3acf2a1657673ffbf28fc4068bc22db7db454096677ec14439f5231a074a53
font_02_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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