Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a7e4e43e45aae0…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 08:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b0043422c91b76d223290f8af1ef166f SHA-1: 0fea7b61ce629d27843bde23d011ed43dd374cad SHA-256: 74a7e4e43e45aae0ece34354cf79386863f74b7df4f516b5f129ea9e2eafeb68
126 Risk Score

Malware Insights

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

The PDF file 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 'midufefew.ru' and disguised as a report on financial reporting in Malaysia. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/123?utm_term=regulatory+framework+for+financial+reporting+in+malaysia PDF link annotation
    • http://health-top.ru/jiliwaacg57.pdfIn PDF document text
    • http://afterdealer.pro/stickman_backflip_killer_5__androeedbtu65.pdfIn PDF document text
    • http://wowit.pro/computer_basic_course_hindi_notesere9f.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/vietnam_furniture_industry_report_2018joa41.pdfIn PDF document text
    • http://7lessons.space/free_fire_tournament_app_downloadhqsbt.pdfIn PDF document text
    • http://coupons2020.info/chihuahua_pomeranian_puppies_for_salez9gja.pdfIn PDF document text
    • http://coloradocustomelectric.com/lanogevonumyasre.pdfIn PDF document text
    • http://santecmb-sarl.com/ranifufabubetifalovexxkka.pdfIn PDF document text
    • http://ewwe.space/how_much_is_a_2011_bmw_328xixm4am.pdfIn PDF document text
    • http://santaparker.store/27754068918r1gfk.pdfIn PDF document text
    • http://arfesopt.com/rexoresabeniperata0ixnl.pdfIn PDF document text
    • http://remont-kholodilnikov.website/english_diagnostic_test_elementarym6d54.pdfIn PDF document text
    • http://navaram.online/panasonic_phone_kx-tgd220cpi87b.pdfIn PDF document text
    • http://gta-msk.ru/motorola_moto_g6_xt1925-2_manualst99l.pdfIn PDF document text
    • http://about-central.com/90537002728dpheg.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/easy_disney_piano_songs_free_sheet_musiczeevj.pdfIn PDF document text
    • http://pe50off.pro/bissell_proheat_2x_manual_9200i9lyo.pdfIn PDF document text
    • http://hotita.space/inicio_de_curso_escolar_2019_mexico0f7zy.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/gajabedafot/management_consulting_services_industry_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/dark_souls_2_servers_shut_down_2021.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_fb2910105d77407c88acd79ce90b05b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/2112793013.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_173dd26a4bf142f3a643face8e460a8b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 5600 bytes
SHA-256: 785fbaf8bbb371a700f23bcbf5b0fd996d0a97e1813e04dfef57423266a7bc17
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 11416 bytes
SHA-256: 2919e2bd92f2b855851794a9e9889989cf97e2590654ef5402786f96c4cf49d4

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