Malicious PDF — malware analysis report

Static analysis result for SHA-256 17549bc1efbe1460…

MALICIOUS

PDF

124.8 KB Created: 2021-03-20 07:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68969a9b9c357a0b590f4eebd8a09aa0 SHA-1: 2275c7268fbaf4f05d789b4a972a784145fdc308 SHA-256: 17549bc1efbe1460224a7743955a35e9119396a370f70acaf6d2390b24a938e6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=will+star+citizen+ever+release+2020 PDF link annotation
    • http://rasudilikid.mywebcommunity.org/lic_jeevan_anand_policy_details_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/0gijejb/91860748523.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc6aa308d232.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/hhjboYc/super_mario_3d_world_japanese.pdfIn PDF document text
    • http://lnstagramcentre.net/best_frozen_drink_at_dunkind6xzy.pdfIn PDF document text
    • http://sowadegepixu.22web.org/how_to_reset_a_compressor_on_a_refrigerator.pdfIn PDF document text
    • http://figosagimetiki.iblogger.org/where_is_the_reset_button_on_a_maytag_electric_dryer.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/FIif9hb/searchview_android_example_sqlite.pdfIn PDF document text
    • http://copyright-supporthelp.com/fifigasikarigebivheem.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/fajimubadevogigasuxupoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_603505c501ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/Tbm9Jhh/wafilojaledaxenuka.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/fedex_ground_bill_of_lading.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_6049c49723342.pdfIn PDF document text
    • http://bajelow.iblogger.org/cdc_clabsi_guidelines_2016.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/como_se_hace_un_manual_de_usuario.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/sugosubexez/how_to_charge_small_ipod_shuffle.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/a_weather_report_script.pdfIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/morse_code_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/boney_m_all_christmas_songs.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_off00019de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE7 4868 bytes
SHA-256: 9eb83786aff438ba7bb9e5bb3d824b1f91b5990208a1fe8e83a2c0ac1f16fa00
font_01_sfnt_off0001ae7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE7A 12284 bytes
SHA-256: 98b2f0bcb69772a48c9fd79d454ff81925dae3abd4aba1f57c9cbbc75af3f333
font_02_sfnt_off0001d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D731 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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