Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b628bec214c253…

MALICIOUS

PDF

111.0 KB Created: 2021-03-27 16:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f889cd4438fd27b0b4ca4f85d59fd9de SHA-1: 204663bd9b959cee00c2edcf4dad3d585bdd3286 SHA-256: 34b628bec214c25321cb7e0c0ee332ca4256e18c309d26dfc00b2e248fc55ad6
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a lure to redirect users to potentially harmful websites. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 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://resalured.ru/award?keyword=buck+converter+applications+pdf
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5fe445d3a3ef6.pdf
    • http://xexapitanegis.getenjoyment.net/sets_relations_and_functions_class_11_solutions.pdf
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/e236926f.pdf
    • http://junumidutuzakox.getenjoyment.net/nifowevunufobixo.pdf
    • https://cdn.sqhk.co/viwitukaz/SvjcSge/32107469250.pdf
    • http://pirewarekow.mywebcommunity.org/leadership_development_free_download.pdf
    • http://mapugukabazewu.scienceontheweb.net/hindi_alphabets_video_download_free.pdf
    • https://cdn.sqhk.co/bigokukanuf/o0Mjdjh/castle_hustle_cheats.pdf
    • https://cdn-cms.f-static.net/uploads/4380072/normal_605b74211f843.pdf
    • http://jepenufi.getenjoyment.net/milton_bradley_game_of_life_instructions_1991.pdf
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fc8859776cfa.pdf
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5ffd693a3e66a.pdf
    • https://cdn.sqhk.co/talokelom/mls4Dia/gupaletugazefu.pdf
    • http://fojukivijivik.medianewsonline.com/cost_accounting_question_paper_2020.pdf
    • https://cdn.sqhk.co/xudadidi/haibT0Y/ostriches_habitat_information.pdf
    • https://cdn-cms.f-static.net/uploads/4471238/normal_6042dc82e6b57.pdf
    • http://jirenaxapibetig.scienceontheweb.net/porque_no_me_crecen_las_uas_y_el_cabello.pdf
    • https://pitadamep.weebly.com/uploads/1/3/4/8/134886808/kazolibijoveso_kixawevorat_fetamigimogifil.pdf
    • https://cdn.sqhk.co/dunafafaxen/AxffjfT/how_to_study_for_exam_in_2_weeks.pdf
    • http://sumapewub.getenjoyment.net/9583626957.pdf
    • https://nerutemiwuxofa.weebly.com/uploads/1/3/1/3/131398157/semizudomiput.pdf
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fe6df23e4a23.pdf
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fecea2203bd6.pdf
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fe49e29985c8.pdf
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/2242055.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zakefuki.myartsonline.com/darogusanevajovasokibel.pdf
    • http://lapetagalelan.myartsonline.com/mivosexelirazagazobulaza.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a0f.bin
56feef72b326307c52385ef6cc58c3bd18376ba920f08f887e99437dc010c0cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0F 5324 bytes
font_01_sfnt_off00016c48.bin
b9a3a92d3621de39c8492616d754e198d2d9386997384a147aa11e8b44ae78ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C48 13352 bytes
font_02_sfnt_off000198cf.bin
292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198CF 16096 bytes

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