Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e75d9fdd21a8928…

MALICIOUS

PDF

76.3 KB Created: 2021-03-30 22:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dbffdc0698149536e2458a45cf2c4af8 SHA-1: 0e2e69fd1b89204198f5a80a01f4dbd88d121606 SHA-256: 4e75d9fdd21a892845e61fdf343468b525a7c07b4ad7b73cc72f9aa4bb4babba
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to a watch manual, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=citizen+eco+drive+skyhawk+manual PDF link annotation
    • https://cdn.sqhk.co/wufevinek/Qgdehj8/fastest_delivery_in_cricket_history.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/aiiqJBN/carpet_cleaner_home_depot_rental_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/aBifmij/how_to_get_real_steel_game_on_ps3.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/moniciones_dominicales_ciclo_c_2019_ciudad_redonda.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/gAhhhcb/anime_character_creator_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/OibziaK/cultist_base_song.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/what_are_the_causes_of_bantu_migration.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/zitebibuxumijigodureze.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jbC5Sja/end_stone_brick_blast_resistance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/87cc757f-875a-41c2-8dbe-52d29cb44f08/85975527639.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/ceiba_2_software.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/external_cladding_metal_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/book_of_john_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d0b171-a544-42fe-9d7e-56e7d726fd48/nietzsche_twilight_of_the_idols_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9404977e-9bc2-4d0c-aa74-0a08234a8f57/zumoge.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/fafugixalivirabupulunow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef4b532-f82f-4622-94be-4797574abccd/xavirokusufadijiteru.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/organizational_culture_theory_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/ap_grama_sachivalayam_model_papers_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 5452 bytes
SHA-256: 05ac4c0f866f93082f0f485517ff3f660333011b992776774dcfba8c6cdc4c93
font_01_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 10004 bytes
SHA-256: dea5ecb71fc0a05ba5329ede847d1e83a93f575ff5d988c3cff4b6ee15230bb0
font_02_sfnt_off000115fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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