Malicious PDF — malware analysis report

Static analysis result for SHA-256 592385a3bba4c338…

MALICIOUS

PDF

170.4 KB Created: 2021-03-06 15:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8e79fef3fe51b5f709c2c361afd2cfa6 SHA-1: b5781a9a0cbf3ad6f63ea1beda82f886bc7d0dfb SHA-256: 592385a3bba4c338b733f1f386914c3a22a09b98e585f378c5d8abbad8c11d93
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, with one pointing to a suspicious domain ('botokaw.ru') that is likely used for phishing or malware distribution. The PDF's structure and the presence of many links suggest it functions as a link farm, a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://botokaw.ru/123?utm_term=what+is+religion+explain PDF link annotation
    • https://paripipedaninez.weebly.com/uploads/1/3/4/4/134444050/2868784.pdfIn PDF document text
    • http://pubgucbayim.com/addons_maker_for_minecraft_pe_pc7sv5r.pdfIn PDF document text
    • http://legendbilisim.com/tipos_de_sociedades_en_colombia_cuadro_comparativovdum1.pdfIn PDF document text
    • https://murimuwisoruda.weebly.com/uploads/1/3/4/0/134017177/fetarif.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/mjhaifN/free_match_3_games_offline.pdfIn PDF document text
    • https://ledimame.weebly.com/uploads/1/3/5/3/135306483/b2e899de6cf91.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/icgghjq/paleo_general_tso_chicken_instant_pot.pdfIn PDF document text
    • http://tevfikyuce.xyz/how_to_learn_kendoho6kh.pdfIn PDF document text
    • http://znakomstva18x.site/nukelekikafezlkb.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/eVL3Fxz/wars_the_british_empire_lost.pdfIn PDF document text
    • http://spiritstudio.ru/light_brite_cube_refill_sheetsyl65e.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/budesolabuvixizos.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/jfjdMgJ/99_impostors_1_crewmate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/neviwove/bajirao_mastani_tamil_movie_tamilrockers_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ff987f-cd5c-4332-a6d3-476a07256d5a/best_app_learn_to_draw_apple_pencil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce96e8a7-0149-4f55-9804-6dead66a7331/lojifaxonunufepomuwekit.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/12848902265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21b413e-037c-4b41-b247-105ccdbcf07d/69361055062.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/90219990556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0019126-1fe9-4347-bf53-4332f239a9c7/vakidowunodono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd32fd8-75da-4061-b681-7a0b446dcede/mr_smith_goes_to_washington_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/congruent_triangles_gcse_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f6a3f9-bd64-41a1-b2c4-69c9841ced11/84726621593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bd8e77-8545-48d7-93fa-f839178b36ad/exide_battery_charger_10900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bd3e1b-97dd-4bd5-8c6a-66de3a65004c/mofurepaniz.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_off00026112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26112 5164 bytes
SHA-256: d1cc2c136a26ea5bb05618a5b7d01a9d100031d7574ac4ab85f56ef56509703a
font_01_sfnt_off000272af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272AF 12884 bytes
SHA-256: 3e2cadc8eb587c93c43452d10f6440a80fcfb1dfc3807bcef5bb3ff38a4f2f80