Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d26dc6cda8c20ed…

MALICIOUS

PDF

79.8 KB Created: 2021-03-27 20:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f12e9b6b737a6a3378cf18144dbe48b4 SHA-1: ce8ba2f3e2b65fd210bde10426b3bdbf87f401ee SHA-256: 2d26dc6cda8c20ed2cefb4387ddd35facdf8fe8d888739c28cecf541c1ac2688
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are identified as redirectors to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=english+11+semester+1+final+exam+study+guide In PDF document text
    • http://subisabadakabar.iblogger.org/diary_of_a_wimpy_kid_the_third_wheel_ar_test_answers_quizlet.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/american_history_trivia_easy.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/2011_chevy_equinox_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/dIggy9M/change_management_skills_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_5fd2853eb5690.pdfIn PDF document text
    • http://terunokunojusa.22web.org/liverarifufepan.pdfIn PDF document text
    • http://nuredalad.iblogger.org/fevafa.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/jbhaib6/synthesia_keyboard_settings.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/estadisticas_de_alcoholismo_en_mexico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_600e2707088b0.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/jgOO1Ta/13750037085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_6057bdc7893fd.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/CGhh3C9/gather_round_homeschool_curriculum_review.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/zodulinawubiwaxex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_605b512387dac.pdfIn PDF document text
    • http://daritibule.iblogger.org/giwevetijinowodemem.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/fxHZijf/word_link_free_word_games_answers.pdfIn PDF document text
    • http://sefexetewizu.iblogger.org/rasiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_603298ad32c46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasasopatadinu.epizy.com/midiwozevi.pdfIn PDF document text
    • http://tobavukopipe.epizy.com/tikusomojaxavasi.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/spiderwick_chronicles_the_field_guide_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/ite_checkpoint_exam_1-_8_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/android_version_update_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/what_is_basic_sentence_structure.pdfIn PDF document text
    • http://wometopususap.rf.gd/35158633932.pdfIn PDF document text
    • http://lenisemi.epizy.com/27049859567.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/wugojoroditeladif.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_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 5500 bytes
SHA-256: 3dddfa60e0a1773971c5dfb096e44e71d485550c982e69b6541123ebdf78900b
font_01_sfnt_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 10388 bytes
SHA-256: 020f6f160fae25ac51aa1c69ba63b5ce997ae22cc2f75de8aa6f855c4fc3ac70