Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce1e7141d659b3f…

MALICIOUS

PDF

78.0 KB Created: 2021-04-06 13:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5265b3c0e0300b9ddc07d6b3f8b57102 SHA-1: bf21d4e3705759f07dc7fc0c6762d81d23c685d8 SHA-256: 0ce1e7141d659b3f188269ed8b1483cf9deb27d37171a6192e3ac90ea76b56a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous embedded URLs, with several pointing to disposable domains and potentially malicious redirectors, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the presence of numerous suspicious links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=what+are+some+characteristics+of+rainsford+in+the+most+dangerous+game PDF link annotation
    • http://makamar.xyz/73495338373tzpo6.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/laboratory_apparatus_pictures.pdfIn PDF document text
    • http://nibelv.xyz/triggering_townd307l.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/2jjsihQ/new_romantic_love_song_ringtone_download.pdfIn PDF document text
    • http://predouche.xyz/kosovawamuki8qgnb.pdfIn PDF document text
    • https://cdn.sqhk.co/lalamiteliw/Whj8RZh/hd_wallpapers_1080p_iphone_7_plus.pdfIn PDF document text
    • http://nextauto02.ru/rejafemisodujafub3vp9.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/fbfhgj3/45976102627.pdfIn PDF document text
    • http://stroiline74.ru/40106818161jm6cf.pdfIn PDF document text
    • http://muldwych.com/525803770952hfb8.pdfIn PDF document text
    • http://shopmzm.site/business_analytics_manager_salary_us76uay.pdfIn PDF document text
    • http://milanomodaitaly.site/d2x_cios_installation_guideeze88.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/pofilakabagasazizez.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/jl9Xjhj/pevuk.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/0c94447c-ba0c-46bb-a61f-587e6e15f2f4/xalogexeduga.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/bibivanawiwomuredanewenen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352ddf06-45d1-42c3-975c-dcc9c30dde8a/java_8_update_271_32_bit_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbd3dfb-1455-4750-b602-6b542505e441/guess_baby_food_game_template.pdfIn PDF document text
    • http://temolujipu.myartsonline.com/candide_voltaire.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/lafedegufewemulaxubovum.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_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5416 bytes
SHA-256: 6ec6354d2e4f7161e0053b5fc6bf0346865a05fbbd6332eba03017550e8d1fc5
font_01_sfnt_off00010606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 10756 bytes
SHA-256: 8e681590e520b209368de72307d8ec43958bef8609912588420abfd838bcf61b

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