Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf021ce80e762c2…

MALICIOUS

PDF

80.0 KB Created: 2021-05-14 13:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5d4317fdb1d5a0f8e6722fcc233f2b71 SHA-1: eda4c06f2f915b93ffa2681c261ec8ad8f8136de SHA-256: ebf021ce80e762c200da715c8a327690e99190ef986a5d8a17fd728a1a0bb1e1
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, many pointing to disposable domains, and one prominent URL related to 'maze runner series in order movies' which acts as a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/strik?utm_term=maze+runner+series+in+order+movies PDF link annotation
    • http://jukobuxavejiz.22web.org/the_maze_runner_age_appropriate.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/b4idhhy/battery_day_time_est.pdfIn PDF document text
    • http://nusobekod.22web.org/72635521860.pdfIn PDF document text
    • https://bavazaje.weebly.com/uploads/1/3/4/3/134335981/6405553.pdfIn PDF document text
    • https://kenomixu.weebly.com/uploads/1/3/0/9/130969587/xefasure.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/jaR2hbu/text_twist_2_word_unscrambler.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/acetilcolina_farmacocinetica_y_farmacodinamia.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/117b5476122d.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/hh2B0xU/18657451023.pdfIn PDF document text
    • https://cdn.sqhk.co/nogugojuri/Cjl9Uha/69861105746.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/elijhiH/mutesufosamirejeb.pdfIn PDF document text
    • http://takovevagagiv.scienceontheweb.net/complete_yaseen_shareef.pdfIn PDF document text
    • https://tuzuratodaf.weebly.com/uploads/1/3/0/7/130738639/123a2c4a06dcd.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/feguwegeximawujoke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xanedemu.onlinewebshop.net/geometrical_tolerances_standards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1815fd0-80f7-495d-bcfc-ea7e5fbde91a/xofozomajijatubapares.pdfIn PDF document text
    • http://rilimopukalus.rf.gd/photolithography_semiconductor.pdfIn PDF document text
    • http://lopotenunuguw.rf.gd/seerat_quiz_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214982f4-7f9f-4fdd-8198-9d9f6014187a/60823206661.pdfIn PDF document text
    • http://vivimaga.epizy.com/english_to_bangla_translation_software.pdfIn PDF document text
    • http://napuganenafu.rf.gd/66082152454.pdfIn PDF document text
    • http://bozalusi.epizy.com/xogenazewiwukojasudunizaf.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/walmart_black_friday_map.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_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 5052 bytes
SHA-256: 6e3d433f636229ed0d363151351f09fd824463470620442a94f6b76c8565fefa
font_01_sfnt_off00010afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 11476 bytes
SHA-256: 22fafaef7deda12a6536f503008b7b4a5bf70fc9bd9372599d34b540f89c3565

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