Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a4777a9c0e7074…

MALICIOUS

PDF

82.7 KB Created: 2021-03-13 21:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5b3a24ecf2e9955ca0c61be951edea24 SHA-1: 14986abc7da3b404ae9729954c252c9b6c03dba1 SHA-256: 54a4777a9c0e70749fb736a094a27d4bc8462ad5b104cab37b53108e5b1f518e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=computer+programming+associate%2527s+degree+online PDF link annotation
    • http://zoomita.space/how_to_buy_and_sell_in_stocksrh83v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5fdb643649a91.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/rapaterifetipeguwifupomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_601114f149bf1.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/6133902.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/gibasaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/tVZmifg/goxolabixoze.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/why_did_ruger_discontinue_the_sr9.pdfIn PDF document text
    • http://genusadnlo.space/ao_smith_water_heater_parts_manualbw235.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/vereinfachte_steuererklrung_2020_anlage_n.pdfIn PDF document text
    • http://milano-moda.space/is_early_january_a_good_time_to_visit_disney_worldtvetd.pdfIn PDF document text
    • http://vitalia-transports.com/headway_elementary_workbook_4th_editionzbktd.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/how_do_i_reset_my_jbl_xtreme_speaker.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/8hgjhij/nopudusodubolinozamufu.pdfIn PDF document text
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/e8aa7ea29ec58a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5fe8831a1b70a.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/Qjd1iK1/centipede_and_millipede_game_boy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawurekod.epizy.com/lenovo_ideapad_y500_15.6-inch_gaming_laptop.pdfIn PDF document text
    • http://kokuvomoboseri.rf.gd/mev_exocet_build_guide.pdfIn PDF document text
    • http://wififeju.atwebpages.com/26496665621.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_off0001052a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 5332 bytes
SHA-256: eb60a6abd0240fe2dca70bc2bc9c0f6576aeb16d326b8c69f22ed3473ec7608f
font_01_sfnt_off00011734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 11268 bytes
SHA-256: c397466af2eed8250758a8b3f69541c79cc372f89e7bc638155fa0eb32bad8c6

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