Malicious PDF — malware analysis report

Static analysis result for SHA-256 199ab0e74eec45f4…

MALICIOUS

PDF

78.3 KB Created: 2021-05-15 15:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 640bd23859bd2001e4f8eb4ef8c49048 SHA-1: e58c1214900475fd0678a74769d8f1c0664445e1 SHA-256: 199ab0e74eec45f48f6b948dbac338a741a35a872306ac5d253912fa385f9e60
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a notable one pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are indicative of a link farm designed to redirect users to potentially harmful sites.

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://mezovuduw.ru/strik?utm_term=book+the+only+thing+worth+dying+for PDF link annotation
    • http://meetsol.xyz/garmin_zumo_660_map_updateiszj0.pdfIn PDF document text
    • http://cafe-cok.ru/geniwobin2a65w.pdfIn PDF document text
    • http://sehq.xyz/how_to_remove_norcold_rv_refrigeratorbsbve.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/1_what_causes_dipole_interactions6nojh.pdfIn PDF document text
    • http://nasty666.space/how_tall_are_the_heroes_of_olympus_characters2sye5.pdfIn PDF document text
    • http://requiredjokblog.com/atomic_weight_of_elementsow8e9.pdfIn PDF document text
    • http://roflan.site/multiplication_chart_1_30vje0s.pdfIn PDF document text
    • http://zufabud.22web.org/here_again_elevation_worship_chords.pdfIn PDF document text
    • http://sayfelengs.space/the_colour_of_magic_movie_free_downloaduxpb3.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/graco_pack_and_play_assembly_manual7ws0w.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/68f9401c-e57a-4233-9a3a-dc5c2adb8738/how_do_i_get_free_navigation_on_uconnect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03fb737-4f48-4d1a-b6e6-35ec99054901/85268047547.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/annotated_bibliography_apa_format_cover_page.pdfIn PDF document text
    • http://rozosijamuruxo.rf.gd/what_does_service_tire_monitor_system_mean_on_chevy_equinox.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/weider_pro_4950_total_home_gym.pdfIn PDF document text
    • http://mojilobopage.rf.gd/genomestudio_sample_sheet_template.pdfIn PDF document text
    • http://kiwutixukunow.epizy.com/fujovupubonuwebebefawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ae9793-d239-428f-91d8-be0971269fe3/wuvuxagisoxoxalerab.pdfIn PDF document text
    • http://pixezoki.rf.gd/23160931189.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/uc_browser_apk_for_java_mobile.pdfIn PDF document text
    • http://zavipazo.epizy.com/nerujo.pdfIn PDF document text
    • http://xorosobodudirug.rf.gd/unreal_engine_4_android_game_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd4b939-e8ad-4d3f-9aa8-cb6ed87cae3a/solo_parent_leave_benefits.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_off0000f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 5088 bytes
SHA-256: 9f3dd945ac886f030d223b5d0be15b042ab21d57ac3fcc198e388231f713ec88
font_01_sfnt_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 10704 bytes
SHA-256: b8bbb5027b1897f79c3f7cccaa43ecb5f269f0e0a4f8f3fc1c8a5aeea070c15b

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