Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed1bc4503e81817…

MALICIOUS

PDF

75.9 KB Created: 2021-06-09 15:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 814b913fad176dc4212f97b1674fe650 SHA-1: 04e92d05e42cd58fd481dc4797d22e6597099c95 SHA-256: bed1bc4503e81817786082423490dfbe5374f9de83e4cc1e5452cd01fb6c8f2a
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to 'oniceh.ru' and containing a 'jingle bell song download' lure. The PDF's structure suggests it acts as a link farm, likely directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://oniceh.ru/pbw?utm_term=jingle+bell+song+download+in+mp3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460709/normal_600e3128a97c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6063348d5ef2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_60520756b2752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144413820/15093929695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf145a36-a0f7-465e-a735-371f3ae56747/monudesomabaxadad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc48b85-4e7e-43b9-84d4-ca9d64100d77/vosenutexokezakigu.pdfIn PDF document text
    • http://zulamiz.pbworks.com/w/file/fetch/144888525/minecraft_pocket_edition_mod_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8446d0-f945-4c4a-b3c7-1b2564c3e892/fenurerutixekufetoka.pdfIn PDF document text
    • http://jeveriwilum.pbworks.com/w/file/fetch/144838119/does_bacardi_rum_have_carbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5ad54c-f913-412c-9b4f-de26e259a4ff/avatar_a_lenda_de_korra_dublado.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144675222/mapenara.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144419778/best_server_for_ark_ps4.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/63132776864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfcedc6-2b95-418a-9b3a-f97fdfd6c0bf/how_to_tattoo_books_free.pdfIn PDF document text
    • http://botinuba.pbworks.com/w/file/fetch/144609378/mivosalavukesaxileninolok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e39baa-e0cb-4df7-b3b8-7930cfbca0bd/putijizoxisalidevoxexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1276f19c-b9e4-4ad8-9626-b817ae7a2334/how_to_use_relion_lancing_device.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144851454/nonton_drama_cambrian_period_subtitle_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4692e3de-e208-4ff5-8f2c-fae73a028de9/kung_fu_panda_legends_of_awesomeness_villains_wiki.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144660912/how_much_weight_will_i_lose_on_bone_broth_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d28188-f230-4bf7-94e2-1a4705ed7490/vubipuvifofuzolobive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07380033-57ca-4abf-b3fe-7c5a3b52710f/what_is_the_importance_of_cleavage_in_embryonic_development.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/devikij.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/wozerig.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_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5568 bytes
SHA-256: 9f0b4e9f6af30e042d4dc9d07efb045ac1b861a51dc553fbbdb0a804f302c71e
font_01_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 10712 bytes
SHA-256: 59d3106bcf8d1a01cc668da91321036fdbaebba715a8b532b2d7e007ca9c4be8