Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec46970bf34efac…

MALICIOUS

PDF

80.9 KB Created: 2021-04-06 06:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eb33e134119ce566032b74984c66814 SHA-1: d1c95d3284e6420b7226c51f7e68c08502d70aaf SHA-256: 7ec46970bf34efac4385be9b43cc2cedd0f21e43fea8445ef71d47b6167c7ec8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. An external URI pointing to 'kuzutuzo.ru' was extracted, suggesting a potential phishing or malware distribution attempt. While no scripts were directly extracted, the presence of embedded URLs and the overall detection profile strongly suggest a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=2005+nissan+pathfinder+transmission+oil+change
    • http://dogoderusokita.iblogger.org/26816610649.pdf
    • http://cardioactiveitalia.site/how_to_measure_ring_size_at_home_printablev8a2r.pdf
    • https://cdn.sqhk.co/muwizavo/gjdI4hg/joxepowaxa.pdf
    • http://tomogorman.com/54112804154v1m8s.pdf
    • http://uniques.space/894344593734hwy5.pdf
    • https://cdn.sqhk.co/botonerepap/ZThcu96/blade_runner_2049_cast_name.pdf
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fcf6ef9b0a5b.pdf
    • http://zupinuxuxodu.iblogger.org/difubobusotisudipusov.pdf
    • http://eliyalte.com/what_speakers_are_compatible_with_audio_technica_turntable3kv8w.pdf
    • http://premium-cinema.com/vezirefavomogi96kkr.pdf
    • https://cdn-cms.f-static.net/uploads/4476569/normal_6028f49bcd484.pdf
    • http://lotofotu.iblogger.org/radio_sony_xplod_52wx4_instrukcja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e686b30-567b-4ad4-b9a9-d5e303adef12/birikun.pdf
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_7fc03165bc2844a4b69502455eeb9337.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a60d9fad-524a-4eb0-b17a-7e32065745b2/self_esteem_worksheets_for_elementary_students.pdf
    • https://uploads.strikinglycdn.com/files/cfbd2b9b-35a9-4442-8887-e067b09dd7c6/88101429055.pdf
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_1e66b6de9a4140f09869a2faf7e50b3a.pdf?index=true
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_2cef20b589234c268993736cba0d6a71.pdf?index=true
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_a5e45dff6064453aad997147f4d22b29.pdf?index=true
    • https://uploads.strikinglycdn.com/files/48e6f07d-ec75-4e95-b037-8e7036f62de9/the_atmosphere_an_introduction_to_meteorology_14th_edition_answers.pdf
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_9a5626e2f8ab4f2cafba6dbed8930fec.pdf?index=true
    • http://vivusefodubelep.epizy.com/vogezexipofivawipad.pdf
    • http://vurasoda.rf.gd/2167153424.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_off0000fe90.bin
5f293e3160ce94c153fa584d0eb364ed6d473ea1f01edb97421c1e9aa9c14034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 5872 bytes
font_01_sfnt_off00011266.bin
a86f1b9f6babed2bf1db384471f6d77d1171f6c4636ff168e23b5218e40baa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11266 10476 bytes

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