Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bb3f8899bb6cc0…

MALICIOUS

PDF

73.0 KB Created: 2021-03-22 00:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e1e2d4b0c17a3486acb85d5a2f8bec SHA-1: efd6eaf61c836b03c0a77abd75f7f4e89d5d6d92 SHA-256: 86bb3f8899bb6cc0d935a989aaf734f663e6af011138f3401ee6a030c89f838a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a 'worksheet' lure. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=line+of+best+fit+worksheet
    • http://superheatbelt.xyz/pojuwusawofolexuhu8se.pdf
    • https://cdn.sqhk.co/wesebewoweva/TwdhjaD/undateable_girl_definition.pdf
    • https://cdn.sqhk.co/bebumila/hhbjf6L/68593417969.pdf
    • https://cdn.sqhk.co/wozobifanu/7dO73hj/marble_solitaire_game_solution.pdf
    • https://cdn.sqhk.co/simunenij/FBGjisi/list_of_catholic_saints.pdf
    • http://dom-bita.org/project_cost_calculation_excel_sheet98f1j.pdf
    • https://cdn.sqhk.co/fulaxanew/gdMcthg/injustice_gods_among_us_ipad_hack.pdf
    • https://cdn.sqhk.co/lobinazema/hRbZF8v/2945490257.pdf
    • http://revershjtb.site/33036815338ag5n6.pdf
    • http://ins.expert/wobujilleejw.pdf
    • http://nefozufovi.scienceontheweb.net/5_types_of_claims_in_argumentative_essay.pdf
    • http://yazansoft.com/mercury_retrograde_october_2020_virgoaicb3.pdf
    • https://cdn.sqhk.co/tabakotodi/akyhhP6/truck_simulator_europe_2_mod_apk_android_1.pdf
    • http://afracheat2.xyz/the_unbearable_lightness_of_being_lyrics2z23y.pdf
    • http://paruxezogu.mygamesonline.org/kitchenaid_professional_600_parts.pdf
    • http://xagugudel.sportsontheweb.net/77252347203.pdf
    • https://cdn.sqhk.co/tamupoto/hijojex/football_championship_table_2019.pdf
    • https://cdn.sqhk.co/xororofomed/TFNEMii/m_c_discount_washington_pa_15301.pdf
    • http://lyudi23.ru/pefudorowituzak9f2dv.pdf
    • https://cdn.sqhk.co/julukimesof/Ueyiage/red_white_blue_white_red_flag_country.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jirabasojexosud.atwebpages.com/gosaxo.pdf
    • http://samesesodore.onlinewebshop.net/batoponigedirux.pdf
    • https://s3.amazonaws.com/tugumeb/69031363925.pdf
    • https://s3.amazonaws.com/mesotodimus/annexure_k_format_provident_fund.pdf
    • https://s3.amazonaws.com/tosevud/eventide_space_reverb.pdf
    • https://s3.amazonaws.com/tokudapele/welixuxagexorabu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a4.bin
2a19da26b554ffa854664e6be74f8c2176a1431b881198fd02500f4ac4ca2420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A4 4636 bytes
font_01_sfnt_off0000e567.bin
f990f8036321377f156ed20fd30b3bad16235e625842f3f34acf3a861d601b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 10264 bytes
font_02_sfnt_off00010870.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 4324 bytes

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