Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d977d42ed902858…

MALICIOUS

PDF

72.8 KB Created: 2021-03-09 01:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1c6a67c04d468c785cf49a1f410ed57a SHA-1: 866abb62524b1519d99b24486d9c67ed4aec3018 SHA-256: 1d977d42ed90285867c257494534f2f7bf3ab80703a04afebd69ac74a8ab8ecd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The ML classifier also indicates a high probability of maliciousness. The document body, though heavily obfuscated, appears to contain keywords related to product listings, suggesting a lure to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=intex+ultra+frame+pool+liner+replacement+18x52 PDF link annotation
    • http://wapividazofar.scienceontheweb.net/what_part_of_florida_has_the_coldest_temperatures.pdfIn PDF document text
    • http://xexogafuko.22web.org/income_tax_calculator_ay_2020-_21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5ff6919dbf95d.pdfIn PDF document text
    • http://konanozopesan.22web.org/obusforme_travel_pillow_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480897/normal_5ffcb839ee666.pdfIn PDF document text
    • http://myyshooop227.site/minn_kota_terrova_80_ipilot_link_for_saleemmwn.pdfIn PDF document text
    • http://moitender.org/should_i_buy_a_branson_tractor0wpu7.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/beginning_piano_sheet_music.pdfIn PDF document text
    • http://dkmz2.club/48027493735sri4t.pdfIn PDF document text
    • http://talemine.getenjoyment.net/koreader_columns.pdfIn PDF document text
    • http://qwonder.space/24215137516yjl50.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/skyrim_dragon_language_letters.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/manual_guitarra_espaola.pdfIn PDF document text
    • http://hrushch.space/modelo_de_alianza_para_la_produccinqw6ct.pdfIn PDF document text
    • http://all-system7.club/51991919703s75w2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fce38a50b3e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duginefasozuna.rf.gd/wobizizakomamefuwoxojoni.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/world_map_printable_free_black_and_white.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/buvokigikoxudo.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/where_to_learn_photography_in_lagos.pdfIn PDF document text
    • http://mowadavukusut.epizy.com/sim_enhanced_yield_fund_fact_sheet.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/18605621739.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/which_pump_is_more_efficient.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/fly_tying_desk_organization.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_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 5492 bytes
SHA-256: 11429529a6503150eccb81eb00763075de2022cdaadc28f69a80bf733cd8dd48
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 11008 bytes
SHA-256: 0c0871bdb0b5bb90792d090a589378b5bd01d2bebcad32cc7ef13bb1ac760022

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