Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e01c09e21bc4233…

MALICIOUS

PDF

86.9 KB Created: 2021-05-16 00:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 399e4cfd5c9bc333c5acd91986cda0e6 SHA-1: 5957d78f25e0e15c47ad6c91ad089a1c95ca9fe8 SHA-256: 5e01c09e21bc42339c87ea2deb321609e598967c4c645269de7749da2c423228
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 critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to the document acting as a link farm, with numerous embedded URLs pointing to potentially malicious domains. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

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://resalured.ru/strik?utm_term=who+owns+news+media+investment+group
    • http://getporte.xyz/26461973650mzskb.pdf
    • http://shoppermarket.online/wedding_intro_after_effects_templateshvk80.pdf
    • http://trydouche.xyz/how_do_you_use_a_700_peak_amps_duralast_jump_starterz6181.pdf
    • http://vulgargirls.fun/przymiotniki_dzierawcze_angielski_wiczenia_dla_dzieci0aqia.pdf
    • http://tradebot.space/bogewozevotefvqj2.pdf
    • http://smartradiobf.ru/livros_para_iniciantes_em_inglsuhp3o.pdf
    • http://reduslim-eu.site/21340992901jwtl4.pdf
    • http://fortuneo.biz/data_structures_using_c_balaguruswamy_free_download9j4c6.pdf
    • http://lnstagramverifiedsbadgesforms.com/present_continuous_tense_exercises_with_answerswpvwz.pdf
    • http://lg-copyrightforms.com/ver_el_hobbit_3_version_extendida_online_castellanonmjq1.pdf
    • http://hesap-al-sat.com/jenn_air_gas_stove_top_troubleshootinglzuho.pdf
    • http://detonic-italy.website/34012517958qdj73.pdf
    • http://gosoputixipe.iblogger.org/how_much_are_macbook_screen_repairs.pdf
    • http://xelipev.22web.org/yvr_arrival_information.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nabufopona.epizy.com/85361592393.pdf
    • http://kawosujozobi.epizy.com/sedak.pdf
    • https://s3.amazonaws.com/julaxel/87913560149.pdf
    • http://fugexumelelada.rf.gd/lozetigusat.pdf
    • https://s3.amazonaws.com/rubidokezive/insert_data_sqlite_android.pdf
    • http://noborixujap.epizy.com/kenmore_ultra_wash_quiet_guard_4_specs.pdf
    • https://s3.amazonaws.com/kiremefegonar/how_big_is_deltas_carry_on_bag.pdf
    • https://s3.amazonaws.com/metakibeme/garage_gear_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010700.bin
218ce28ebc7a122417c33fb66e90cda0bc5f4210c4f058072631795ca6c96824
pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 5388 bytes
font_01_sfnt_off0001193b.bin
d025b17197e3ae4b543a7acb63978baac58981d7e4a27015f824fd55b68703e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1193B 10912 bytes
font_02_sfnt_off00013e81.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E81 4324 bytes