Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0b89807c19612d…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 17:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce42cc9b100dc5b22bb76e06688fbacf SHA-1: 506bf3f884bafae39b0b226ec47b97cb1024ab24 SHA-256: 5b0b89807c19612dafb0c26970d705aab7d43b00a1a1d3d3e6b842e079b645d1
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically linked to 'mtb cycle games' and hosted on a disposable domain, indicating a phishing or malware lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

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://soxebez.ru/123?utm_term=mtb+cycle+games
    • https://cdn.sqhk.co/vibisimak/mjggmjs/ice_scream_2_horror_neighborhood.pdf
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/damogezoderizo.pdf
    • http://domobifotuza.sportsontheweb.net/titemixexefelakegakeg.pdf
    • https://cdn.sqhk.co/xibidodoko/Thg6Ghj/mebunesenegasoli.pdf
    • https://cdn.sqhk.co/kazipexe/1jc7hdV/59060118748.pdf
    • http://maxidadikegi.iblogger.org/what_is_the_feminist_perspective_on_research_methods.pdf
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/1185154.pdf
    • https://cdn.sqhk.co/dekawako/SWjfmia/83985628370.pdf
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/gowobabasupisekor.pdf
    • https://cdn.sqhk.co/wamedexipun/ihjeTha/90683993740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://laxilajolagavaj.rf.gd/943_frases_basicas_en_ingles.pdf
    • https://s3.amazonaws.com/tajimipojimo/apc_back_ups_es_550_service_manual.pdf
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_4a6c06539ec540b2bd69d79b6c74ea83.pdf?index=true
    • http://maxuluxusit.atwebpages.com/pafemirokunupokojezaw.pdf
    • http://wemazepiba.epizy.com/esl_calendar_worksheets.pdf
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_7df988772787460b8fd7204f483b30ac.pdf?index=true
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_f245f6f535f747b2800f017d6c6838ed.pdf?index=true
    • http://duzavito.epizy.com/beard_style_app_android.pdf
    • https://s3.amazonaws.com/fajonubinomeder/18970833323.pdf
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_8b154b707da249b493a2d15d37586ff0.pdf?index=true
    • https://s3.amazonaws.com/resabomibogodaw/metal_roofing_sheet_suppliers_in_edinburgh.pdf
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_56e9bddef2ba450c9979bfa7394fba9f.pdf?index=true
    • http://jopinewo.epizy.com/82935902979.pdf
    • https://s3.amazonaws.com/mawesenasijoser/show_2_excel_sheets_side_by_side.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f197.bin
6a591cb00079f831a1009631854613d1b37b7bbf724f7bb20d3eeb67fbcd7454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5272 bytes
font_01_sfnt_off0001038f.bin
acb4c3ba466ecb6ddab4eaa1e1665ffff8554c639dadd17eeda58cd834fc085e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10396 bytes

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