Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f60cc6f635e21a…

MALICIOUS

PDF

81.8 KB Created: 2021-05-01 13:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 97729b24ecacdfa45b1bc8f5cb0d844b SHA-1: 28b7c290dabfff6752ccff545d1887c331ed3177 SHA-256: 26f60cc6f635e21a44e05c48d489c67f2acc4bfbe33014f15f904e8c0cc82e93
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' and containing a 'twilight saga full movie online watch' query parameter, suggesting a lure. The PDF structure and the presence of external URIs indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://baarspo.ru/strik?utm_term=twilight+saga+full+movie+online+watch PDF link annotation
    • http://karnaval.host/ninobalozirenoninegasjfx7w.pdfIn PDF document text
    • http://saudiautoinsurance.com/niwoporinigazza9f1.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/jgdiijY/duxizol.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/chinese_to_english_dictionary.pdfIn PDF document text
    • http://cashbackmoney.info/does_adp_have_a_time_clock07oef.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/bodies_by_rachel_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/wDjfThc/bibabapamejavujanowatefe.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/ccna_certification_books.pdfIn PDF document text
    • http://sutixekume.22web.org/scansnap_s1500m_driver_mojave.pdfIn PDF document text
    • https://cdn.sqhk.co/sarodeduz/60gd2X7/wheel_of_fortune_google_slides_template.pdfIn PDF document text
    • http://repochka.site/echo_voice_recorder_free_download25u8w.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/8haWnih/busawokebebegomozo.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/kedewasazaxamux.pdfIn PDF document text
    • http://test123test.xyz/first_signs_of_pregnancy_acneev2fo.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/ridugijulubimax.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/rules_for_adding_and_subtracting_negative_numbers.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
    • http://fojakosi.atwebpages.com/brianna_wiest.pdfIn PDF document text
    • http://niworojuxine.rf.gd/cardi_b_press_video_song.pdfIn PDF document text
    • http://kirawolus.rf.gd/rival_stars_basketball_mod_apk_revdl.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/regaxi.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_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 5180 bytes
SHA-256: 69315fe69e1ef3384621d57f95e6ca2d08d490e48be023db48ca4c3c1fc220db
font_01_sfnt_off00010609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10609 11212 bytes
SHA-256: c6090958e3403139991ed22e37d5e03383f93bc3ed506b2e76fa3186e978174b
font_02_sfnt_off00012bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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