Malicious PDF — malware analysis report

Static analysis result for SHA-256 c326a1b9b5870ae1…

MALICIOUS

PDF

78.4 KB Created: 2021-05-02 05:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4ad67dfd32134e3fcc87b81e23dd81cc SHA-1: ecd3ce51a5efd65cf712c90a4a7c64bcfabfdbaf SHA-256: c326a1b9b5870ae1861c5d8997528b30aebf67dd49438a30a32b7018e16f860e
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded external URLs and a visual download button suggests an attempt to trick the user into downloading a secondary payload. No scripts were extracted, but the overall pattern indicates a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=canon+mx300+drivers PDF link annotation
    • https://cdn.sqhk.co/towitudamuga/kOWgiqa/baby_hazel_cinderella_story_games.pdfIn PDF document text
    • http://woodlesenka.ru/bawuwabanntx.pdfIn PDF document text
    • http://proba7.xyz/valor_da_mensalidade_do_curso_de_inglesc9b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_601260b1a097a.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/hfjgsj8/free_online_casino_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/FjbPid4/29600711394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_6044724d7b555.pdfIn PDF document text
    • https://cdn.sqhk.co/venebavor/ahbTg57/380949604.pdfIn PDF document text
    • http://levantegroup.net/degazbmcsj.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/KifnUpj/parking_near_royal_farms_arena_baltimore_md.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_604058a9cf78d.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/gXBgcgC/slacker_definition_origin.pdfIn PDF document text
    • https://cdn.sqhk.co/ketadasogob/gctjbjg/vewawozarigidego.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/jjbjbig/eye_colour_change_lens.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fd7c960440a6.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/bubisifapagefe/google_play_store_for_pc_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/zarinetekozimadamivufudi.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/7952367046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a42493-4eaf-4dcf-9f49-190d8a548bcf/how_to_connect_soundbar_to_vizio_tv_using_optical_cable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2241fb9e-a724-406a-9332-8df3ae8e01a3/36507986579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0992a38c-4b04-491f-b039-f0dd2d3baaf2/bach_cello_suite_1_prelude_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1160ef6-c1a0-4179-bb45-774b19badeb7/how_do_i_fix_my_table_of_contents_in_word.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_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 5280 bytes
SHA-256: c627a5eb43015308e84e7a62685f7719f2e3f7e3d56b13326825be8736cc6221
font_01_sfnt_off000104ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104ED 10984 bytes
SHA-256: 9fd94e02cbcb5af5681dac22f65744e89477fd1971fdaf1b0170ca37431a0d1e

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