Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe6fd0295fca16f…

MALICIOUS

PDF

79.9 KB Created: 2021-05-31 16:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4705bbff93d8cd2a0c50b55ebb87aa07 SHA-1: d7ad38fd2a5345bca6a47e4cccafe2831f6acae6 SHA-256: abe6fd0295fca16ff480175652f4e7449db9ba50b5eed555c43f7f8b4713fb5e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL pointing to 'queure.ru', which is likely part of a phishing or malware distribution scheme. The presence of PDF-specific heuristics suggests exploitation of PDF vulnerabilities or malicious content embedding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://queure.ru/pbw?utm_term=riddles+with+answers+hard+pdf
    • https://cdn-cms.f-static.net/uploads/4452169/normal_601445427e4ca.pdf
    • https://cdn-cms.f-static.net/uploads/4375073/normal_605482a3b74ec.pdf
    • https://cdn-cms.f-static.net/uploads/4421474/normal_605034cb1b2b8.pdf
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fe6e29c58ae1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nusuwoxub.pbworks.com/w/file/fetch/144413517/to_kill_a_mockingbird_vocabulary_chapter_24-25.pdf
    • https://uploads.strikinglycdn.com/files/f0b9bd0f-9a15-4db3-8a11-9170ec7ccf5f/cyberpunk_2077_ps4_gameplay_video.pdf
    • http://lekipirunezi.pbworks.com/f/my_boy_emulator_apk_ios.pdf
    • https://uploads.strikinglycdn.com/files/791e45b0-c4ec-4ac8-9e55-0749a17b257b/fobinugodetujokuzegumafas.pdf
    • http://fuvesiwowegu.pbworks.com/f/exercises_on_direct_and_indirect_speech_for_grade_6.pdf
    • https://uploads.strikinglycdn.com/files/97446820-8f5f-41ca-800f-5e255fac593f/5827567574.pdf
    • https://uploads.strikinglycdn.com/files/18b8be31-7267-4e2f-b493-1894159f563a/rafuzinozunoxemupewulefat.pdf
    • http://xalanupuzewo.pbworks.com/f/93425515896.pdf
    • https://uploads.strikinglycdn.com/files/289a4411-c03b-4bac-9d31-75ac7c0a673d/64002203665.pdf
    • https://uploads.strikinglycdn.com/files/2138aaed-8322-4637-8430-453fbfbf0264/inicio_de_ciclo_escolar_2019_estado_de_mexico.pdf
    • http://xojifot.pbworks.com/f/how_to_reset_tzumi_sound_mates_no_buttons.pdf
    • https://uploads.strikinglycdn.com/files/f3da70f1-4eb7-4347-bda6-daf140d4e5c4/honeywell_quietcare_humidifier_hcm-6009_filter.pdf
    • http://zegugas.pbworks.com/w/file/fetch/144411402/98489508918.pdf
    • http://xifilipisi.pbworks.com/w/file/fetch/144413700/coca_cola_lottery_company_history.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144413340/ejercicios_resueltos_de_gases_ideales_fisicoquimica.pdf
    • http://kufujibumufa.pbworks.com/w/file/fetch/144413400/calidad_productividad_y_competitividad_deming.pdf
    • http://kedetuwi.pbworks.com/f/42044879049.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144411681/how_to_mix_salt_reef_tank.pdf
    • http://visetululiv.pbworks.com/f/how_do_i_find_world_war_1_service_records.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_off0000fa3d.bin
f64ce14012baed0b7f5deec63f71610ba6abfc95a854442b20c008745cdcd201		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 5228 bytes
font_01_sfnt_off00010c14.bin
531a74025e7dfcc1b3e7a344f8768ad0869cd04529042105ca58d6fb0672edbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 11720 bytes

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