Malicious PDF — malware analysis report

Static analysis result for SHA-256 6584af88d0df8227…

MALICIOUS

PDF

75.8 KB Created: 2021-03-25 01:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cec6abf8829def6688cf616f37fa0162 SHA-1: 79a6bc8c6d2c3a47c247788c070bac6291fcbd50 SHA-256: 6584af88d0df8227fee3d54d939b0082ba3eeebc35b0609c415960a92d505f4c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains keywords related to tests and questions, likely serving as a lure to engage the user and encourage clicking on the malicious links.

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
  • 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://soxebez.ru/strik?utm_term=house+tree+person+test+questions PDF link annotation
    • http://circulyarkadigital.xyz/how_to_read_notes_and_resthohur.pdfIn PDF document text
    • http://csxmoney.info/kogitomewivalubf0ql.pdfIn PDF document text
    • http://skidki-day.shop/zusakipu9sm.pdfIn PDF document text
    • http://dujivodawalaxu.22web.org/nanepevawekix.pdfIn PDF document text
    • http://siwutasir.iblogger.org/adenosina_farmacocinetica_y_farmacodinamia.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/dedet.pdfIn PDF document text
    • http://siteznakomstv69.space/83013766820quhrp.pdfIn PDF document text
    • http://wegixaro.iblogger.org/how_to_get_a_limited_driving_permit_in_georgia.pdfIn PDF document text
    • http://testvvd.xyz/dd_3.5_sneak_attack_prestige_classesbthgl.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/annotate_evernote_app.pdfIn PDF document text
    • http://evatopshop.xyz/watavupumobojetodeloy7xys.pdfIn PDF document text
    • http://uspeh.icu/nanolemifahr10.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/d72cbe92-3f25-46e9-bfd1-a5954b59e9a1/is_kingdom_manga_over.pdfIn PDF document text
    • http://befadiw.rf.gd/ujt_relaxation_oscillator_viva_questions_with_answers.pdfIn PDF document text
    • http://robatirewixiwol.rf.gd/gluten_free_pasta_sheets_woolworths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a7b316-e34c-45d0-80f6-83e952c65a58/zujaxenokigiganoxifekejod.pdfIn PDF document text
    • http://bapifodog.epizy.com/botellas_de_plastico_manualidades_para_nios.pdfIn PDF document text
    • http://baverasoge.epizy.com/d_d_5e_nature_cleric_guide.pdfIn PDF document text
    • http://nupedapubamamu.epizy.com/1182527116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9eaf38-a3fe-4020-8bd3-cecf60b80a1e/android_game_development_javascript.pdfIn PDF document text
    • http://bidusopevix.epizy.com/shed_plans_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5320ea-683f-4b55-bf57-497f0d8c456d/20000_leagues_under_the_sea_full_movie_1954_online.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_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 4660 bytes
SHA-256: e5e94e3d2424efdabef7344a1cd072a9aa3fbe0ebb9c3135fd481fd4c8b89800
font_01_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 11048 bytes
SHA-256: c141f49fa494786d8e815c1643cd841d5cd5b0d3c8b5d3353246b1f55418a627

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