Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a20f73bc915906…

MALICIOUS

PDF

73.2 KB Created: 2021-03-20 20:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 746c0eda3b08988b8e203ea8d2381dd5 SHA-1: 5de40ef51a80f38596e07744c71542c803b03a70 SHA-256: 88a20f73bc915906b4c185cb12b1fc58a7a7f055171ca25dfcc0527058d4c4bc
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, but the presence of many links suggests a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wix?keyword=paramavatar+shri+krishna+last+episode In PDF document text
    • http://tabagobadirab.iblogger.org/gidizenobeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/ijAjche/27987960821.pdfIn PDF document text
    • http://pavajevubuj.iblogger.org/ballerina_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/wgimhgM/cloner_dual_apps_multiple_accounts_parallel_space.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/iggeiai/f1_manager_2019_pc_game.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/fidd1Ft/new_york_city_rent_guidelines_board_increases.pdfIn PDF document text
    • https://cdn.sqhk.co/livujiguf/fRjapo2/denigefipobepexetiv.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/85459146040.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/how_to_answer_law_exam_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/fhvkIyi/68906891143.pdfIn PDF document text
    • https://cdn.sqhk.co/mesodimeduje/XI9omep/long_clear_coffin_press_on_nails.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/ggawVge/jijereribasumavumudaxaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/ejhzgfI/70063689616.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/32155283062.pdfIn PDF document text
    • https://cdn.sqhk.co/nudizodi/KDgfFhj/63321540250.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/biaX38Q/lewidepizebez.pdfIn PDF document text
    • http://dexiserabasavo.mygamesonline.org/ethiopian_orthodox_tewahedo_bible_in_amharic_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449419/normal_5ffc2c88c9cd3.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/icjhSJH/gisopunifoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408582/normal_60007f2c6aa34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_604f6655ea5f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimibidubarabus.epizy.com/phone_answers_then_hangs_up.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_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 5324 bytes
SHA-256: 7ae5b0b50610898606fd040815fc0cc5c58b959293dccc45c6a44d37460486b3
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 10552 bytes
SHA-256: d2139c05220af120b9c758aeebc9377941cadad59863f896fed47e5e2cf75843

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