Malicious PDF — malware analysis report

Static analysis result for SHA-256 905003845a81d131…

MALICIOUS

PDF

75.1 KB Created: 2021-03-06 04:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ad18437238ae8224105eb2f8d41539fd SHA-1: e5dc915b580a2a8120b174730928250352bcd342 SHA-256: 905003845a81d131e6ba55dc3ed133c35a732d092081e297c3f8a9977e76f240
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to 'kuzutuzo.ru', suggests an attempt to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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
  • 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=2006+freightliner+columbia+radio+wiring+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376101/normal_60354dad96ddc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5ffa83608bb8d.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/desesapatowivi.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/divina_commedia_inferno_canto_6_testo.pdfIn PDF document text
    • http://mirror-x.org/79283966073jx2m0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_601bc3531ba2d.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/what_does_terminate_mean_on_roblox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fcda0326dc9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_5fdc3498151c7.pdfIn PDF document text
    • http://itwomen.space/lufiwororigatuvipimukunoiq2ky.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/petojerur.pdfIn PDF document text
    • http://pixell.store/cub_cadet_lt1045_specsdpyrq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_600529baa7414.pdfIn PDF document text
    • http://nely.xyz/broken_bow_oklahoma_fishing_report6n3w2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5fd23b3114e61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5ff9ea84c6d5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/boori_bassinet_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/platform_7_coffee_west_broadway_vancouver_bc.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/fimufofu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/roll20_add_custom_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/71947861154.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/93829487554.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/teaching_strategies_gold_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/christmas_dingbats_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/the_diamond_sutra_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/beaux_arts_magazine_free.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_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 5820 bytes
SHA-256: 87dd90a8bce46214da919d0485c914652d74f888e2ed36181c4312b1acd583d4
font_01_sfnt_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 10332 bytes
SHA-256: e5da4de6484e7e2aedb1764af90fca0f7491445b75aa1922b1745b47f156eec0

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