Malicious PDF — malware analysis report

Static analysis result for SHA-256 8478b3134e8d5042…

MALICIOUS

PDF

119.7 KB Created: 2021-03-22 21:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3caeb3c02710fcaf9994313593b0d1a SHA-1: d47493440bc80bf42247f14b7c3f7107d3064428 SHA-256: 8478b3134e8d5042fd8ba7508a2caf5571a04905cbd382c5c16f65c95abf1698
246 Risk Score

Malware Insights

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

This PDF document is identified as a credential phishing lure impersonating Amazon. It contains a mass external link farm, with many links pointing to disposable hosting services. The primary malicious URL identified is https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/jemopironedenitod.pdf, which acts as a redirector to further malicious content. No scripts were extracted, but the PDF structure and heuristics strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/jemopironedenitod.pdf.
  • 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://kuzutuzo.ru/strik?utm_term=swann+security+cameras+wireless+outdoor PDF link annotation
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/jemopironedenitod.pdfIn PDF document text
    • http://umniashka.ru/520582292221lsxr.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/5408270.pdfIn PDF document text
    • http://itawomen.fun/fishing_tackle_at_bass_pro_shopsyvkmd.pdfIn PDF document text
    • http://salonhq.xyz/gudewutararupevwlxcu.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/addition_with_regrouping_worksheets_grade_2.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/alpha_word_in_urdu_alphabet.pdfIn PDF document text
    • http://raicen.com/53593680762pmhjv.pdfIn PDF document text
    • http://tabikola.online/840435406498jhoz.pdfIn PDF document text
    • http://copyrightnotices-form.com/volca_sample_2_song_modeobbt4.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/5f8a35009e.pdfIn PDF document text
    • https://lekolusogi.weebly.com/uploads/1/3/4/3/134365603/59ba5.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/d0751af8aa51ed.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/44a52c1d-a1b3-46b8-9da6-825f9f2d5a90/kigokuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea785a9-ab0d-4be9-9c7a-2eaf1d5ff7fe/is_it_cheaper_to_build_a_home_or_buy_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c8a69d-7aef-4b96-a06c-2bc5e65a5f31/how_to_make_smoothies_with_frozen_fruit_and_greek_yogurt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422a277a-a0fa-4858-aea2-d7fe133c893e/lesson_10-1_developing_formulas_for_triangles_and_quadrilaterals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5db1f0d-4da5-432e-9522-b931bfff4112/the_boy_in_the_striped_pajamas_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053efb2d-c9b0-44d0-9da9-9067c57ae532/5436738741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495860a7-7b0d-464e-bb2f-10b5a3740c9a/28582957393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786324dc-7ecd-43a1-8a85-8cdd688ba280/the_shack_book_quotes_with_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe668d8-cecf-4dde-bb88-679b88e8b01e/1995_s10_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8124a2-576d-435f-aa4b-37404cb8e560/how_to_train_your_dragon_3_full_movie_in_hindi_download_filmyzilla.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_off000196ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196BA 5380 bytes
SHA-256: db89aaf0c5ecb7e7271e06cfb2108df0fac80b55dfe44b46214ef319684a3545
font_01_sfnt_off0001a901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A901 11740 bytes
SHA-256: 44730ed78173f761fd6642c5bcd78fe667be409efd7a0479c2f217e28b9b5f47