Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26cb8d922f935d6…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 18:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc21569869c441ba35ceee1fbe023351 SHA-1: d2c556b5ed44b34a6dc9e3f4f4e8d16c1089cf9e SHA-256: d26cb8d922f935d6ffd8ae4135be4d40514412acde1747958302ba81a591acc5
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. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely a phishing or malware distribution domain. The PDF structure and embedded URL suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=what+you+feel+or+how+you+feel
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/gefimiwotux/cMhfuhc/falling_for_christmas_full_movie_online_free.pdf
    • http://dostafood.xyz/multiplication_and_division_flash_cards_onlinezo8su.pdf
    • https://cdn-cms.f-static.net/uploads/4368226/normal_604b52ef92b0e.pdf
    • https://cdn-cms.f-static.net/uploads/4393486/normal_5fd99ed1ad52b.pdf
    • http://dsv-trening.ru/how_to_meditate_lawrence_leshan4fa8i.pdf
    • https://cdn.sqhk.co/jukunobegabe/LzijIia/advertising_agencies_nyc_1960s.pdf
    • http://bufutos.22web.org/30649672475.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdf
    • https://cdn-cms.f-static.net/uploads/4489441/normal_602acd39695b3.pdf
    • https://cdn-cms.f-static.net/uploads/4465012/normal_602259ac5d04b.pdf
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6015feae9b9f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nafamaragisek/is_fisher_price_rocker_safe_for_newborn.pdf
    • https://s3.amazonaws.com/foneniz/awdhesh_premi_ka_gana_ing_hd_video.pdf
    • http://libizokize.rf.gd/raxaxofubizobezosiz.pdf
    • https://s3.amazonaws.com/fusopoxipo/zatiladejud.pdf
    • http://wikiwujekuloxok.rf.gd/kabir_singh_bekhayali_female_ringtone.pdf
    • https://s3.amazonaws.com/mubemutolewe/bad_girl_picture.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_off0000ed12.bin
2736a5d699fd0013bba630a0f875f3089a22b4eeccc0b593324778a97480c40a
pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 4884 bytes
font_01_sfnt_off0000fdca.bin
cb22ada9622d8df11ac31e5821d9d2c944057227a7f275906cba7a04357521bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 10532 bytes