Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f3923a174fd92b…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 01:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 007e4d27e29387e93066d3902804cdcb SHA-1: b56969f7dbd69c9d54108f4f112f4cb8c361d7ff SHA-256: b1f3923a174fd92bfcca9be88a27c497487ff93d31e673e2a4e3f7ed8cc01b39
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The primary URL, 'https://seumenha.ru/wix?keyword=mision+y+vision+de+coca+cola+peru', suggests a phishing or SEO poisoning lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=mision+y+vision+de+coca+cola+peru PDF link annotation
    • http://nonly.xyz/violin_scales_bookgll7i.pdfIn PDF document text
    • http://noverst.xyz/anatomy_and_physiology_lab_manual_mariebxgfw8.pdfIn PDF document text
    • https://cdn.sqhk.co/kubarevopew/ciaihAW/commercial_extinction_definition_apes.pdfIn PDF document text
    • http://sellforce.ru/brother_dcp7065dn_software0td89.pdfIn PDF document text
    • http://proba7.xyz/252285070823g7ug.pdfIn PDF document text
    • http://interplast.ru/communication_plan_templates_for_project_management434p7.pdfIn PDF document text
    • http://4d-5d.com/hp_50g_reviewdds5x.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/hf6KijD/air_tycoon_5_unlimited_money.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/overlord_light_novel_volume_12_translation3l035.pdfIn PDF document text
    • http://online-bestshop.xyz/j_alfred_prufrock_characterrg2kb.pdfIn PDF document text
    • http://udilische.club/jungle_adventure_nyc3td5d.pdfIn PDF document text
    • http://jakor.pro/denon_avr-x2100w_price_in_indiab9n45.pdfIn PDF document text
    • http://ryduslim.website/9776426975y7zb9.pdfIn PDF document text
    • https://cdn.sqhk.co/gonibowijum/jdjaGwd/kokaxavebojijiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dcca84ee-5672-4b5a-9065-905e40dac616/89579274662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bc0964-fb32-49a0-b3e7-be37b118505b/95552702863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7335d64d-97d9-491f-9c83-14d9209a9217/xiluvedumapavupokiwow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22e1e3d-cf51-4c7b-8e8b-b00ca9c67687/wall_street_journal_renew_subscription_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11aa36cc-7b5d-4ce8-a98e-6d1be2361116/17064233505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd260b7-e249-4cfe-b915-90d01e408bc7/freak_the_mighty_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98E 5036 bytes
SHA-256: b69fa3b04db649f0e01525586b7ac5a7a80dc2104bb7f48d310cdf9363ab3672
font_01_sfnt_off0000eabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABD 10012 bytes
SHA-256: c6c913bfa728b066bed82ffb97e4ffe2a6c8285d4afe2ff0539de88d1d1b07ff
font_02_sfnt_off00010d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D07 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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