Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26e7507ee9729e5…

MALICIOUS

PDF

76.7 KB Created: 2021-04-08 02:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d533c7a19a1e86f7ffc9501c06f3368 SHA-1: 5704409ee78c52da6f3b1d32fb6f3a619bfaefc3 SHA-256: a26e7507ee9729e5fb24ac1fb7b4b85c46ed9c406554ac1de6c8e7fb0a979e8f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'resalured.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Bio-rad c1000 manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://resalured.ru/123?utm_term=bio-+rad+c1000+manual
    • https://cdn-cms.f-static.net/uploads/4453134/normal_606e2cfd72693.pdf
    • http://laluwaraselolar.mywebcommunity.org/tp-link_tl-sg1005d_not_working.pdf
    • http://vovadot.22web.org/jadevenewixomomejenuzaj.pdf
    • https://cdn-cms.f-static.net/uploads/4450632/normal_60179515438d6.pdf
    • https://cdn-cms.f-static.net/uploads/4416938/normal_60407d615ee1e.pdf
    • http://wodedutipif.medianewsonline.com/94101838791.pdf
    • http://tigukifi.getenjoyment.net/betegigazikeporonadifo.pdf
    • http://zaxanoxejem.iblogger.org/adda247_app_for_windows_10_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf0bd34c-7509-468a-b87a-081514194e9f/15696301373.pdf
    • http://libefowojimin.epizy.com/81883073836.pdf
    • https://s3.amazonaws.com/widofafane/c_programming_language_examples.pdf
    • https://uploads.strikinglycdn.com/files/905d8e45-d34e-4471-ac49-16cfa63f31f0/tc_renegade_hunter.pdf
    • http://dezabefuzureb.rf.gd/1868879383.pdf
    • http://foridifakusexum.rf.gd/6120721214.pdf
    • http://rilimopukalus.rf.gd/awas_yojana_up_online_application_form.pdf
    • https://uploads.strikinglycdn.com/files/db027b9c-ed9e-4fff-b6fe-f53bfb4f5806/2016_ford_mustang_ecoboost_premium_for_sale.pdf
    • https://s3.amazonaws.com/lomogas/tipifibovekewaduwanub.pdf
    • http://wozitoso.atwebpages.com/babitidode.pdf
    • http://xazomagojuwa.epizy.com/english_writing_practice_sheets.pdf
    • https://uploads.strikinglycdn.com/files/8d3cde5f-75eb-4b6e-920f-1f9d6cc25d56/stephen_kings_it_2017_movie_monopoly_collectors_edition_board_game.pdf
    • https://s3.amazonaws.com/suxugipipolazog/38872043024.pdf
    • http://vagaxalelevirot.epizy.com/71538358454.pdf
    • https://uploads.strikinglycdn.com/files/354b0479-ab2c-4ca2-b3f7-39eeff3cefcf/counting_stars_piano_accompaniment_sheet_music.pdf
    • http://kuwosuz.rf.gd/aviva_home_insurance_policy.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe9.bin
41c54c57ba5f23f762b6cc5d8a00344c8d0afb63ab58935dd75e5614e84191e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 5180 bytes
font_01_sfnt_off0000fd7c.bin
dc85fa910d330b507554b1a852e3b505df52f58a27a4b08608c21e7e6214f87e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 11844 bytes

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