Malicious PDF — malware analysis report

Static analysis result for SHA-256 6059eb1ec7c1edba…

MALICIOUS

PDF

95.7 KB Created: 2021-04-05 23:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d1fc734c659d7a23969764824a80a403 SHA-1: 22f359bc1441135f77ced389d671dc44eef6a957 SHA-256: 6059eb1ec7c1edbaa9d2670621714e271f52843442b9e9f1bebc578cfd71d03c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=iconographic+analysis+art+definition PDF link annotation
    • http://jotewelife.iblogger.org/bedroom_design_ideas.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/bolton_analysis_orthodontics.pdfIn PDF document text
    • http://luzibis.iblogger.org/98951902454.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/y6YViao/20272362335.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/gjbjilY/tiny_legends_heroes_mod_apk_indir.pdfIn PDF document text
    • http://wigomufeze.22web.org/abb_motor_3d_cad.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/jegfOMo/trucks_tug_of_war_monster_full_match_replay.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/gibikeg.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/taurus_pt111_holster_size.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/best_tablet_for_viewing_drawings.pdfIn PDF document text
    • http://kevotefanevodaw.iblogger.org/vobewulaxewokupof.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/Z773ifX/speed_hiker_mod_apk_unlimited_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_927796f2b75144d4aafc5b35762682a7.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_3b2eb596718a4e5c8fd5b87a2eb60dc0.pdf?index=trueIn PDF document text
    • http://gubadif.myartsonline.com/budomi.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_25ecb2e74c9149a28900fd3d5f4c8f74.pdf?index=trueIn PDF document text
    • http://lukovim.epizy.com/blank_picture_frame_worksheet.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_5977abc2861248fdaf90f48573b1889f.pdf?index=trueIn PDF document text
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_14503828c4e0488b90feef4e968ded8d.pdf?index=trueIn PDF document text
    • http://wekujugom.epizy.com/date_time_picker_android_eclipse.pdfIn PDF document text
    • http://sugexure.rf.gd/17194588814.pdfIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_e02e1a63787d4ebfa894d571f43ba12e.pdf?index=trueIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_73e876cc3ef346199df7e612c5361d44.pdf?index=trueIn PDF document text
    • http://duwemanuwixam.atwebpages.com/flight_stability_and_automatic_control_solution_manual.pdfIn PDF document text
    • http://fopujokites.rf.gd/24659553978.pdfIn PDF document text
    • http://derefoxawuziten.rf.gd/bengal_tiger_telugu_movie_480p.pdfIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_0c2ba3a74bdf4a5ebd8f928426e9fce3.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_e2183073c7674242a0be89957673b578.pdf?index=trueIn 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_off00013391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13391 5456 bytes
SHA-256: b513f168ae1004e1a862a652d4d6f5dde575fb83d9acb6ed67382a4672d6e0e8
font_01_sfnt_off00014628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14628 13260 bytes
SHA-256: 039152237a735c6b28a19865ab034e147814b0eaebb439dbbb62a8ea9db2812c