Malicious PDF — malware analysis report

Static analysis result for SHA-256 213680212809cb82…

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 14:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 577a18ff929f924a361b51479a1c86c6 SHA-1: ec0e5cfeb387c1d8c81cb46dc9b3f90957e721b8 SHA-256: 213680212809cb82303316688e3af128815340e5e84568cdd96a91d898358eee
156 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many of which point to PDF files on suspicious domains, indicating a link farm or distribution mechanism. The document body, though heavily obfuscated, contains text related to a search query, suggesting a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/123?utm_term=consider+the+lilies+music+sheet+free PDF link annotation
    • http://sale20.site/vamojamefepulu05sc5.pdfIn PDF document text
    • http://profapp.pro/lawegq6xkf.pdfIn PDF document text
    • http://neip-forum.fun/how_many_princess_diaries_books_are_there5crkp.pdfIn PDF document text
    • http://dezlice.ru/463123729554iv4m.pdfIn PDF document text
    • http://makamar.tech/medical_fitness_certificate_form_for_job0co4h.pdfIn PDF document text
    • http://vpntop.info/breville_smart_oven_pro_bov845bss_manualursuf.pdfIn PDF document text
    • http://bigno.space/d_day_1944_game_download7s796.pdfIn PDF document text
    • http://13millions.store/los_juegos_del_hambre_sinsajo_parte_1_castellano_online3cl87.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://s3.amazonaws.com/toniseligiwuzux/how_to_program_directv_genie_remote_to_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/wokonasinurogolojowolofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/anterior_performance_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/active_directory_management_tools_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/1631838261.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_768382d74ba548e7998f334aabd0efce.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_3189623ae9fd4f93890e3f5947bace6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd65f848-90a5-4a8a-810f-eca5c3d9229d/wapeduwotiwidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5794f14a-31f0-4c73-8516-5de2638d39f2/how_much_does_starbucks_pay_per_hour_in_arizona.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_ff8c578fda0e4f1aba2e88ffc62e75b0.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_2ad0d942dd2741699c22f4f0ee75ddea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/dungeons_and_dragons_cartoon_episode_28.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_e89483f3d8464f7cb8a7bbb789c30e5d.pdf?index=trueIn 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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 4956 bytes
SHA-256: 56487b167294339c6b5d86669e208a386d802450188303425e35d25186a38c4b
font_01_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10944 bytes
SHA-256: 211f045a3dc6256033168678a548047acba2bbe74b4536e1a2547c2fce0a65b7
font_02_sfnt_off000125eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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