Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f32da3a7d05874…

MALICIOUS

PDF

80.1 KB Created: 2021-04-19 12:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7e1f0dde6fbb33e7087d9b699f8e531d SHA-1: 69d745d65c17f489ba85990a6fe2ed8ad4d2a8b2 SHA-256: 70f32da3a7d05874240f35d4f5614404986b0b16242e7bbb31c3f917ef4b74ad
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://mezovuduw.ru/strik?utm_term=should+my+24+month+old+be+talking PDF link annotation
    • https://cdn.sqhk.co/vamapoludi/23ksIwa/planetary_annihilation_titans_g2a.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/towuxusifirizemako.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/bixufewivufobawigek.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/number_system_in_english.pdfIn PDF document text
    • http://chambrely.xyz/46559144034g5p3a.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/addis_ababa_university_masters_program_entrance_exam_2020_19.pdfIn PDF document text
    • http://tricitysikhs.com/47059662527yfmr9.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • http://sodaapp.club/dunkin_doughnuts_coffee_nutrition_facts8ff5m.pdfIn PDF document text
    • http://speak4pro.com/pounds_of_drywall_screws_per_sheetio8j8.pdfIn PDF document text
    • https://rosunitekuw.weebly.com/uploads/1/3/1/3/131384708/zemexefilaboru_widuder_pulojadajobiwuk_vavowuso.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/mejomoze_rujesaki_fujegekiwomuxij_totatavo.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/5hbgfif/flexeril_generic_name.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/fhaicJ3/detective_story_1951.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/sarunafatagalutumu0l80p.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/870205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf834b2-f71c-44d7-92ad-9e1144ce9967/homelite_2700_psi_pressure_washer_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcb83b6-29cf-4d22-9166-6c95265d084f/wavovisim.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/lemuliwilun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3a779a-d8f1-4cbb-913e-a374e5ef6152/what_is_the_z_score_for_90_percent_confidence_interval.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_99deafff76854009b45e658261633c38.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_2e697a6ea43e4f96aa8f0c568c5e6eba.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_4589b26ca1ec428aa8f7f5ef2fc94cf3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/599b85d9-0f96-4538-a5ff-8442d8b8a074/polk_audio_hts_12_400-watt_powered_subwoofer.pdfIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_1eff92c3ffbe4fab9085bb0108fee775.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_a83d82cccef44d8e98cbbd0f6c3e9b2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b456d55c-b3c0-485c-a5fc-f28c65509b36/how_to_use_kindle_owners_lending_library.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_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 5592 bytes
SHA-256: 810b98899a5a80383e6f6f1f1921bcede4b4d1eff88a71e2fa824be75a650cf1
font_01_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 10792 bytes
SHA-256: 4b2c8bf40b7cbd2442a69487eb4568035240fce5a634b510268620a9360db066