Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6da8d3b7a8052f…

MALICIOUS

PDF

80.6 KB Created: 2021-03-13 23:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b3dd26e8fa1c43b16f5d980d5473e3 SHA-1: 1032af7098b6e65c8218b2f06f3a1013dafdfb57 SHA-256: 6b6da8d3b7a8052ffd5a8d5ee48e8ebb8b19fc3c7ac22725d152a12990366a84
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting the document is a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=business+environment+notes+for+mba+pdf
    • https://cdn.sqhk.co/sunomedude/difrwgc/surgical_mask_amazon_prime_uk.pdf
    • http://arbitestpark.xyz/how_to_use_a_recumbent_stationary_bikeu3z8g.pdf
    • https://cdn.sqhk.co/sunawopi/pTM6Qic/video_camera_for_computer_monitor.pdf
    • https://cdn.sqhk.co/rajexizeba/XgiRmkS/tipetolivolifuwej.pdf
    • http://remontnatali.ru/piping_isometric_drawing_filebgzo3.pdf
    • http://my-favshopf.online/28787266552cw61v.pdf
    • http://mikrotikwizard.com/winchester_model_94_30-30_value_19755vsp8.pdf
    • https://cdn.sqhk.co/gugosobor/Y5hjhan/samsara_room_worm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/11bfafff-f78c-494c-9c73-648897763846/football_manager_handheld_2015_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/01f771ec-d326-4eed-9b78-741c9c538456/pakewabawefajuzulevutaj.pdf
    • https://uploads.strikinglycdn.com/files/91a08534-2eb9-4f6e-b719-18816742ff70/70687475495.pdf
    • https://uploads.strikinglycdn.com/files/60c24b93-ab6a-4829-94ee-926559816cef/jekaxosobojedivefikeviri.pdf
    • http://jutefuzu.rf.gd/carcassonne_abbot_rules.pdf
    • http://fepadegan.epizy.com/23642082529.pdf
    • https://uploads.strikinglycdn.com/files/9814a7a8-9bdc-49f1-a14a-b1b5032c6dad/crusader_kings_2_mods_not_showing_up_in_launcher.pdf
    • https://uploads.strikinglycdn.com/files/3732b84d-c0e5-4ac8-869c-2830b7bc4cda/bosch_super_silence_plus_42_dba_not_drying.pdf
    • https://uploads.strikinglycdn.com/files/69121a58-4dbd-48d9-ad85-6c98cb162d9e/basic_electrical_and_instrumentation_engineering_mcq_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/0c650ea1-096a-4b9e-ad92-ea0f82495cde/saitek_x52_pro_hotas.pdf
    • http://ralarer.rf.gd/7th_grade_math_combining_like_terms_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/3d7cdb76-8631-4708-8f0f-46e039c51e68/rugepuvuriwisegewisegij.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_off0000efbe.bin
a3934f698183dc94d8ae615cd94ac177ee1a5e9d027ab1dce46e43abff6e726b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 5288 bytes
font_01_sfnt_off00010193.bin
73b9b4528f15e9102f40fd4069c1007ebe23077ea296ffa3a50453a7e02619fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10193 10800 bytes
font_02_sfnt_off00012678.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12678 4324 bytes

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