Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7b398fd6bfaeba…

MALICIOUS

PDF

66.1 KB Created: 2021-03-07 02:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 13ec9b06bc874508c406435c6d20aa65 SHA-1: abae7703260bf26c9d6a4fc6d16d6a4574e60997 SHA-256: dc7b398fd6bfaebad4e7ff4f9f8962a11b90799c032f57ccf3f10bb412aad455
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URL pointing to 'https://kuzutuzo.ru/wix?keyword=are+enzymes+reusable+why+are+why+not', which is likely part of a phishing or malware distribution scheme. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, suggesting the document's primary purpose is to redirect users to a potentially harmful external site.

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/wix?keyword=are+enzymes+reusable+why+are+why+not PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/yjdifij/dadubedogodawezijukiwita.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/vojadogixovup.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/75066369659.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/IiaGRTx/2328606690.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/ghSMicc/44061847143.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/fusidejebi/best_army_mission_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/dibefevagoki.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/how_to_play_monopoly_deal_millionaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0008aaf-2909-4a84-acdb-7fd4105f20f0/76451800791.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/how_much_does_a_dbt_therapist_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5016ec18-9fde-418c-bf38-49598539ab33/how_to_start_a_reflective_essay_introduction_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a374df-c01f-48de-9aa7-9ef4b1d24297/jusovadozapisupef.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/vampire_assamite.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/qual_o_significado_do_girassol_emoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e641213d-3090-4385-93fb-09c736a52a14/breville_crazy_scoops_ice_cream_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393fc95c-f357-43b5-8f29-d39c8c53414c/pojonawi.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/psychology_case_study_apa_format_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3b86b0-0873-4089-b992-9ef34108d49a/40715530195.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/77785338965.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_off0000c784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 5300 bytes
SHA-256: 02632718907e6628dc74aaf323ab7488a995a29c464a93a196f39a51e105c49c
font_01_sfnt_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 9920 bytes
SHA-256: c3838b31776150bf246623ed337a0f36ba366576c10b23c21fa18c04cf3fe8a2

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