Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddf3a9aa2fa3cdd…

MALICIOUS

PDF

82.1 KB Created: 2021-03-23 03:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d60d4ab28654bddedc4cf74cb983fce7 SHA-1: 233ee8dbfee6fd4778f38a67a5c27df70db82960 SHA-256: bddf3a9aa2fa3cddb94c3ca56e412f51810b730a08469e2e6a014a7b84178450
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://golowaki.ru/123?utm_term=snaptube+update+apk PDF link annotation
    • https://cdn.sqhk.co/koletexun/bZJvhis/busom.pdfIn PDF document text
    • https://cdn.sqhk.co/felegabiw/gejcjcB/infection_preventionist_non_nurse.pdfIn PDF document text
    • http://getveran.site/cover_strike_3d_counter_terrorist_shooter_apkd8r4w.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/ravpower_filehub_ac750_travel_router_with_wireless_sd_card_readerg763l.pdfIn PDF document text
    • http://polikarmonolit.ru/nutaxz4ou1.pdfIn PDF document text
    • http://groby-ritual.online/60988323058wv0xe.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/ieghjfN/658128807.pdfIn PDF document text
    • http://idealicacolumbia.site/kogilividejasowadamysxb7.pdfIn PDF document text
    • http://trysoda.pro/68622731938vy9kl.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/LjjXvHv/primitive_bubble_shooter_level_295.pdfIn PDF document text
    • https://cdn.sqhk.co/viwukepato/geqczXo/bexibojexataso.pdfIn PDF document text
    • https://cdn.sqhk.co/xiditado/JgcSZRv/70958927296.pdfIn PDF document text
    • http://milesnires.xyz/como_se_hace_manual_de_procedimientos2vbnn.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/xidolurelenemegipaltxq9b.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/djg04ha/monster_castle_defense.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/1b457c4d-8ec5-44ac-a509-a6d10933300f/39453363232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddd593c-c6ec-4b92-8188-f1e309a2db38/76903419464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca97a1e-686d-49a3-967d-54cbba91df2d/9049472344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c805d0e-c574-4408-ba8f-d634e993cfa5/2000_gmc_sierra_starter_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1ea3e6-e7e4-41d5-9a4f-323cb461ab76/brand_identity_design_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838513a6-68e1-4578-b41c-6e5cd6824313/notex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7fdb2f-3667-4478-832c-860b80d44af8/1_000_places_to_see_before_you_die_coffee_table_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbbb20c0-2150-4cf2-bcfa-790981463f91/56226625197.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_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 4952 bytes
SHA-256: cdb8a080a8fb6ce011280081dd9f7a2ccf8def42b16b95f620bbca9eca6769df
font_01_sfnt_off00011739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 10496 bytes
SHA-256: d75c67bc8a764cace5b0a9bd8de413570e34b72694dab4dedd1b9e59c0655c6f

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