Malicious PDF — malware analysis report

Static analysis result for SHA-256 5220121e565e3cc8…

MALICIOUS

PDF

61.3 KB Created: 2021-04-05 08:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2e7e84dd2415413dfd7e8765e6cc9e SHA-1: 7ebb5e3c392abae7ad0f41884e4cf2a8f5f4357b SHA-256: 5220121e565e3cc83e1251606767e99a5656e6bd1f5ea8010fc3ce294beffcf6
94 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a 'general ability test', suggesting a social engineering lure. An external URI pointing to 'zajinet.ru' was extracted, which is likely the payload delivery URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9132

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/award?keyword=general+ability+test+year+4+pdf
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5fe75437c5502.pdf
    • https://cdn.sqhk.co/loxinesupiva/V9VxBhi/razuxovakanimerov.pdf
    • https://cdn.sqhk.co/sojowidaz/jjbihc0/spacex_starship_launch.pdf
    • https://cdn.sqhk.co/melivetipi/awjdggl/burijuxidipa.pdf
    • https://cdn-cms.f-static.net/uploads/4476148/normal_6055f32fae092.pdf
    • https://cdn.sqhk.co/xopuxuvop/hbhdgeU/19833829282.pdf
    • https://cdn.sqhk.co/vafodagusun/fUggY9H/the_hairy_dieters_fast_food.pdf
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fc86638c5595.pdf
    • https://cdn-cms.f-static.net/uploads/4384640/normal_604e36a410557.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8e720f9b-f825-4be1-bd61-c67f1593224c/kentucky_fried_chicken_song_lyrics.pdf
    • https://s3.amazonaws.com/nefomojuwet/penaguw.pdf
    • https://s3.amazonaws.com/xuzed/female_bodybuilding_motivation_video.pdf
    • https://uploads.strikinglycdn.com/files/8b69689e-cfa4-4947-8d66-e3ab9a5aef47/36928037704.pdf
    • https://uploads.strikinglycdn.com/files/df3a25cc-4ecb-40cd-aeca-49df1c6ede8e/how_much_does_a_60_000_btu_furnace_cost.pdf
    • https://s3.amazonaws.com/nonabafat/qlikview_tutorial_for_beginners.pdf
    • https://s3.amazonaws.com/didowugorokirug/zupabotexalexuwutuvim.pdf
    • https://uploads.strikinglycdn.com/files/87697ff9-0a82-4e97-8289-061aea9b80cf/advanced_engineering_mathematics_erwin_kreyszig_solution.pdf
    • https://s3.amazonaws.com/palikuvexake/30482405701.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/free_excel_based_inventory_management_templates.pdf
    • https://uploads.strikinglycdn.com/files/90f5e2cf-0636-4e77-9e12-12969d3bd6ad/rebel_belle_trilogia.pdf
    • https://uploads.strikinglycdn.com/files/a635ed4d-527a-4322-ad4b-57c2392516d3/nowizuguxajatabow.pdf
    • https://uploads.strikinglycdn.com/files/2fcc48dd-1890-4218-8fc4-4db7603aa08d/29573336072.pdf
    • https://s3.amazonaws.com/lekelepowo/nz_shooter_manifesto.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50a.bin
08640847355ef464fab528b411543b2b5554a76ae8cdc4c858f065369b379b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 5396 bytes

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