Malicious PDF — malware analysis report

Static analysis result for SHA-256 109e4ca75721f328…

MALICIOUS

PDF

80.7 KB Created: 2021-05-06 14:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d90a292211fab0ecedd717fb590d31f SHA-1: 11ff5ecdfaed8198af89d163f15434fb2f882e3c SHA-256: 109e4ca75721f3284aaf54ff86ab67af05eaf759be4c7981987b1e3b72ae0073
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication. The embedded URLs, such as https://ponafet.ru/strik, likely lead to the phishing or credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ponafet.ru/strik?utm_term=recommended+watch+winder+settings
    • http://ruvenebigolusep.mywebcommunity.org/why_is_444_a_special_number.pdf
    • http://rezotu.xyz/colonialism_and_imperialism_in_heart_of_darknessauehv.pdf
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/xuguxalijem.pdf
    • http://creditscorecard.info/nuzarupitelukiwolujz6rj0.pdf
    • http://alphabitx.com/85318756180yibw2.pdf
    • http://psyhologrzn.ru/5457398020ykwhf.pdf
    • http://govnosiakxws.online/candy_candy_final_story_downloaddpiqk.pdf
    • http://help-lnstagram-verifycopyrgiht.com/atkins_physical_chemistry_11th_edition_freetkbjk.pdf
    • http://lovechat24.club/kovekazofazifen651p1.pdf
    • http://dirtygirl.fun/35059707212dctid.pdf
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/musebif.pdf
    • https://cdn.sqhk.co/baxoladipezu/hdMggCe/42240927720.pdf
    • http://yourcy.com/how_to_reset_a_whirlpool_cabrio_platinum_dryernvamu.pdf
    • http://leyloften.online/what_is_work_adjustment_theoryfl5mn.pdf
    • http://present-mag.ru/persona_4_exam_answers_07_19y6j8a.pdf
    • http://wolifote.getenjoyment.net/vamonileg.pdf
    • http://lynciguest.com/32214782773lm2qt.pdf
    • http://irbestate.ru/liber_kaos_peter_carrollwzbpp.pdf
    • http://stankoff.org/jaxunuxuwenebmlfih.pdf
    • https://javaredulag.weebly.com/uploads/1/3/4/6/134611390/7820933.pdf
    • https://cdn.sqhk.co/bebumila/igvghjg/wallpaper_hd_for_mobile_free.pdf
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/5ed3a92.pdf
    • https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/6be507a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pujumek.myartsonline.com/kingdons_three_streams.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_off0000fb1d.bin
d53272ac14f3274b6e79aba1a6d8492247d1171067ed02bce91b2922a4cedd0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 5420 bytes
font_01_sfnt_off00010d6f.bin
7380325163bf23851d5e147fbea01f4e7e8579ac1d5e98abdb3a040b7bbd366d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6F 11320 bytes

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