Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5cb2160bf9ab65…

MALICIOUS

PDF

81.8 KB Created: 2021-03-28 08:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 21976d5cffa831f7db16dc576ac33de3 SHA-1: 6dcbcf99dd8a58a5a2328ea95e03031c7e2dd549 SHA-256: 9a5cb2160bf9ab6549577e429b5d5479d42ebf3561b0c391cea80a4f098d855b
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with a primary focus on `https://xajibur.ru/wix?keyword=el+fresita+del+cartel+delos+sapos`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=el+fresita+del+cartel+delos+sapos PDF link annotation
    • http://emmetrix.net/company_core_data_sheet_ccds_templatekyqxm.pdfIn PDF document text
    • http://pubggaming.online/bigutufixowetejadu8wnof.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/bitevafamib.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/basic_electrical_and_electronics_engineering_sk_bhattacharya_download.pdfIn PDF document text
    • http://sandwichhq.club/sex_education_season_3_trailer8zdul.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/national_geographic_articles.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/sugar_shack_blues_song.pdfIn PDF document text
    • http://ig-socialmedia.xyz/teach_like_a_champion_field_guide4kvaz.pdfIn PDF document text
    • http://autobuff.xyz/the_vampire_diaries_season_8_cast_katherineeqigg.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/building_material_construction_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwurekatexo.atwebpages.com/interview_questions_for_special_needs_teaching_assistant.pdfIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_775fb201ef6b4e68be8e9e5a9cb6e891.pdf?index=trueIn PDF document text
    • http://nujugeteteda.myartsonline.com/gemekivijamikidapif.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/dd_5e_feats_that_increase_wisdom.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_e763a3e808de4b29b33fe28c9f84e71f.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/35695815780.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/arabic_translate_to_english.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_c6ee4302313747d8bd7153570a19ccdc.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_2506c367525e487ba58497737fb38f9a.pdf?index=trueIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/livumenumu.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_1a360c282eef4975920d71e7f59913b7.pdf?index=trueIn PDF document text
    • http://gujimosodaza.myartsonline.com/56369135266.pdfIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_3f62c993b5674757860c29dc3c289b13.pdf?index=trueIn PDF document text
    • http://zugepoguj.onlinewebshop.net/office_building_design_plans.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 5108 bytes
SHA-256: f17b5e896ea1946fb02ecf83b481d84cc0d28b86df14738392f84e1bac4f5de4
font_01_sfnt_off000110e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 11976 bytes
SHA-256: 1b22cba8da7e897892db92ea4080ed816c1713497d1dcfe8f06d346a9acf5341

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