Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee8b8ccd126ec17…

MALICIOUS

PDF

76.3 KB Created: 2021-04-26 03:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 91740842209665ba8cee564cfb711792 SHA-1: b0901d98de1191b8889239401f326ac8de9559b7 SHA-256: bee8b8ccd126ec175fb096777fe4808f4866369ef40ff1ee75a5d15ffbfd95d5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with a heuristic identifying it as a 'link farm on disposable hosting'. One of the primary URLs points to 'ponafet.ru', suggesting a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=how+to+make+homemade+simple+syrup PDF link annotation
    • http://gobofan.iblogger.org/best_graphic_games_for_android_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/a4chfpu/juegos_de_robots_vs_zombies_para_2_jugadores.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/792241.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/LRUjfUd/5163863086.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/iehiszp/synthesia_free_alternative_mac.pdfIn PDF document text
    • http://watulexop.iblogger.org/annales_brevet_maths_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/Iizb9jd/pofoxorizatakapiriput.pdfIn PDF document text
    • https://cdn.sqhk.co/fexiseme/iihaNjf/jizajidewepenoxeduko.pdfIn PDF document text
    • https://zikowajemaje.weebly.com/uploads/1/3/1/6/131607239/1891333.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/xekatorudesimeruduxe.pdfIn PDF document text
    • https://veregatuvodomos.weebly.com/uploads/1/3/3/9/133997599/4612239adeec4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lezokagomidozeb.rf.gd/lorakawibagovowapowuduwaf.pdfIn PDF document text
    • http://nulesade.epizy.com/34143453301.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_a1398d3bd7194995aae6cf3ddeaf4713.pdf?index=trueIn PDF document text
    • http://fomuzuzidoduvi.epizy.com/tamilrockers_1080p_hd_movies_free.pdfIn PDF document text
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_f576a9f680e543ebbaedf54c0bdbbf84.pdf?index=trueIn PDF document text
    • http://gagivipupine.epizy.com/gate_2020_syllabus.pdfIn PDF document text
    • https://13a2bf7a-7930-4518-a7e6-737bf3c0aa4f.filesusr.com/ugd/f5c1a0_edbce09fffa74e86b8feff2f296b39a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/xefosokifazaragefinex.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_6f7ffd7b9ae444e1974d66d23cfef227.pdf?index=trueIn PDF document text
    • http://fejuzezoj.epizy.com/guxosofodumis.pdfIn PDF document text
    • http://rulezebasax.epizy.com/90400247097.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/greenland_ice_sheet_impact_crater.pdfIn PDF document text
    • http://xorewabamav.epizy.com/wise_up_book_answers.pdfIn PDF document text
    • http://dekuravimej.epizy.com/kundli_software_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/jenivisepavezejuwok.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/kingdom_rush_strategy_guide.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_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 5416 bytes
SHA-256: 6347d0f70fa2f440fe05b56d0d52568503b2289e674f3e78b6416e3e7918e742
font_01_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 10596 bytes
SHA-256: 17f4407dcfc933e235a561b0541a6e68893dd3818756af02c64e1b545807edcf