Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6217c66dbff9cc…

MALICIOUS

PDF

89.1 KB Created: 2021-05-02 15:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 998f7f5a8c0f58b2129a0f41a256b884 SHA-1: 99bcc121031298a3cfad5ae1afcab7b131dff87b SHA-256: 5b6217c66dbff9cc8a6fd7c7756c0927f3eae18a1751963ac1d2245a11d287dc
126 Risk Score

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 0.9985

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://xajibur.ru/strik?utm_term=three+words+eight+letters+meme+generator PDF link annotation
    • https://cdn.sqhk.co/wuwexosul/icidgcR/soni_t_hegde_wallpapers_hd_4k.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/natopalewen.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/elhavgi/groupme_support_contact_email.pdfIn PDF document text
    • http://vivoxasoro.22web.org/xagixebikaziwupowife.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/samsung_6500_washer_manual.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/67424896939.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/eKjh0If/pottery_barn_christmas_stockings_personalized.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/hegjlHa/36499557132.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/ajjfhbx/disco_zoom_background.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/hahdbgi/kitchen_family_trucking.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/2jjz5sl/telemecanique_altistart_48_manual.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/what_is_the_structure_of_the_book_of_genesis.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/wings_of_fire_graphic_novel_1_2_and_3.pdfIn PDF document text
    • https://cdn.sqhk.co/rawavuzom/Q9Eibcc/amazon_fire_tv_stick_2nd_generation_stores.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/jYifjgG/space_simulator_apk.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/applications_of_photogrammetry_in_civil_engineering.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/labejokawedulimitufaj.pdfIn PDF document text
    • https://cdn.sqhk.co/japivuwali/i35rhhK/spider_solitaire_games_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesivigodexewig.epizy.com/aditya_birla_finance_limited_annual_report_2018.pdfIn PDF document text
    • http://vejebuta.rf.gd/75230573501.pdfIn PDF document text
    • http://xurolawewetaw.epizy.com/basketball_history.pdfIn PDF document text
    • http://ferozar.rf.gd/46676667049.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/domexujifaletijubi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 5280 bytes
SHA-256: 5fbb1b496c883949746591a8dc9296db8ab4eb298f8f49518d0faa1674d0a3ec
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 2712 bytes
SHA-256: 64c9b95a5096266ee5061149746d494e7647c4229b6726fe95b2a4c2452d216b
font_02_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 13176 bytes
SHA-256: 09c6afc88298a545f49c44571694a0bc52eca4e1b721a5fafc583ff3e20e3b47
font_03_sfnt_off00013e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1A 17076 bytes
SHA-256: b7ba278336b6c29ecc012e9ed5047f0f2f3c0d954c4485a8dc89da05177d8e13