Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c937682dba077c9…

MALICIOUS

PDF

81.9 KB Created: 2021-03-22 10:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b5cae5f6d0d5f60becdfb80900dfd39d SHA-1: f79a96cd9d7351f239eb44ab07a8c77095f98ede SHA-256: 6c937682dba077c9638c1126d9f860836fe3279f8eadff91de57d333c23ff2dc
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain metadata related to its creation, but the primary malicious intent is derived from the external URI and the overall classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=how+to+turn+off+pilot+light+on+boiler PDF link annotation
    • https://cdn.sqhk.co/raninogozo/hap6cid/xoguginuxefisuvasajerexos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_6054589de60dc.pdfIn PDF document text
    • http://fipupibiveni.iblogger.org/patriots_cheerleaders_new_uniforms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_60161aacd10ac.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/nggjeje/duck_hunt_nintendo_game_value.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/ggjfeje/auto_clicker_app_download_ios.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/e0a5cba7-234e-46be-922a-270c19f55c93/74719191049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab923cb-2186-4721-8ca7-84bdf9f97cc1/despertando_al_gigante_interior_libro_completo.pdfIn PDF document text
    • http://wuriwafu.epizy.com/adventure_game_studio_android.pdfIn PDF document text
    • http://levegukesiwus.rf.gd/manager_accounting_software_guide.pdfIn PDF document text
    • http://gidigeja.rf.gd/download_bailey_and_love_26_edition_surgery_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669c6e65-701e-40df-8320-ff0b3bb0f113/how_to_run_3_phase_motor_on_single_phase_power.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_824b2f91b62b44aba8e020e8b9e15683.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_cb1890fb21834f3cb7b661fd00901132.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/156e7bfa-ccb6-400c-b892-26fdba528029/10308810518.pdfIn PDF document text
    • http://sujobalon.epizy.com/letter_from_birmingham_jail_analysis_essay.pdfIn PDF document text
    • http://faguvepeme.rf.gd/django_template_variable_alias.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_e1eca61f80a242b1ad34cae635e5ad64.pdf?index=trueIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_6d0990f8997444478057216217e7db90.pdf?index=trueIn PDF document text
    • http://suremosanox.rf.gd/edgenuity_algebra_1_semester_1_answers.pdfIn PDF document text
    • http://resisojopemolo.epizy.com/supumobig.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_cfca0462d1bb4ac29b635d41619fcb66.pdf?index=trueIn 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_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 4848 bytes
SHA-256: cf57ae79f52cec08cda98cbda63e64f68e2a2dddfb9d10c5c2ad05de0c32f4b4
font_01_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 10840 bytes
SHA-256: b0325db376bffd967ec0077cfa3ef697d9d4d436166e0ac2ba7ab4d0bd246a03
font_02_sfnt_off00012bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3