Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2d4af18aafb240…

MALICIOUS

PDF

78.7 KB Created: 2021-03-24 06:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eab321e36c2615c0565eafd766aa4eb7 SHA-1: d7cb1581797a3149d4833c92954039a107605db3 SHA-256: 8a2d4af18aafb24070401135dc65909b2f5ad53f4495eeb2ed1c77b50dcbbd28
96 Risk Score

Malware Insights

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

The PDF document contains an external URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=python+dictionary+keys+to+string
    • https://cdn.sqhk.co/wepenujofow/gWKwjdN/20352065109.pdf
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fe3a2cd63cd9.pdf
    • https://cdn.sqhk.co/runusamopit/yTVmvij/celebrity_cruise_line_stock_prices_today.pdf
    • https://cdn.sqhk.co/wepurodapike/QigUaPE/xifobugidoridimewebapax.pdf
    • https://cdn.sqhk.co/jisepozidis/pgc9wgd/viribixupovawilus.pdf
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6024529c5f340.pdf
    • http://zokazurimila.mygamesonline.org/almanach_vermot_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4421476/normal_605a5968efd50.pdf
    • https://cdn.sqhk.co/navififoro/0Hgcggb/rufosupoduzazarud.pdf
    • http://womenit.space/ranavatakiwimetofu1qisn.pdf
    • http://sugameloxufe.mywebcommunity.org/xedakodo.pdf
    • http://turistik-a.ru/how_do_you_write_a_critical_responserxq5s.pdf
    • https://cdn.sqhk.co/fofateze/eihjfgh/vocabulary_words_list_with_urdu_meaning.pdf
    • http://falorilipeb.mywebcommunity.org/basic_addition_facts_worksheets.pdf
    • http://xulodol.mygamesonline.org/airspace_sectional_chart.pdf
    • https://cdn-cms.f-static.net/uploads/4379230/normal_60445e94cf70b.pdf
    • http://tameeniraq.com/among_us_tips_for_impostorwug4w.pdf
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5fcaf627b78f8.pdf
    • http://nanonewe.scienceontheweb.net/badminton_court_and_rules.pdf
    • http://wirelessinfo.ru/sifinezemajogr5qe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ginowane.onlinewebshop.net/avery_template_5160.pdf
    • http://rogofideb.onlinewebshop.net/how_to_turn_off_bluetooth_on_motorola_apx_6000.pdf
    • http://pozidijapepore.atwebpages.com/the_game_changers_vegan_movie_online.pdf
    • http://ligujizulogi.atwebpages.com/apollo_twin_interface_review.pdf
    • http://wutesejib.onlinewebshop.net/arduino_basic_programming_language.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69d.bin
1a48a4c891997dd4799417924b860e81dc369fac883f59b38ee89b3f6ed801c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 5336 bytes
font_01_sfnt_off000108c9.bin
c6010a82fbe4e2366e1bc42056be7b496f633a64622870fd17a867fe78a16c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108C9 10972 bytes

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