Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cba037503a62b49…

MALICIOUS

PDF

68.8 KB Created: 2021-05-18 01:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 043ff62dd5c8572e78d7e6095dd77ff0 SHA-1: 163b724ec20a3d2f1e48a96872f995f91cad54d3 SHA-256: 9cba037503a62b49e3b2f86807a845a9051857f810a8e525770cebd2250400f8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('seumenha.ru' and 'wimosam.22web.org') that are likely involved in distributing further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to a 'Caddo parish sheriff arrest report'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=caddo+parish+sheriff+arrest+report PDF link annotation
    • http://wimosam.22web.org/koxakixuxumezoxos.pdfIn PDF document text
    • https://vomizovuzib.weebly.com/uploads/1/3/1/6/131637161/zosal.pdfIn PDF document text
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/zaxoromog.pdfIn PDF document text
    • http://savodaveb.22web.org/concentric_reducer_vs_eccentric_reducer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_6008581bb39b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_605b45d7f2261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulazupuvive.epizy.com/autobiography_of_a_yogi_in_kannada.pdfIn PDF document text
    • http://rivowotow.epizy.com/can_you_rent_kindle_books_from_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/kenmore_elite_washer_he3t_error_code_f21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3446d7-5a6b-4e8e-8a43-b6a01e8043bb/65104599193.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/esv_study_bible_books_a_million.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/dilugegiwasigibudavewid.pdfIn PDF document text
    • http://fazavoregotula.rf.gd/50985208101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee6283a-ca4d-4c82-9347-81e4f114f435/bible_new_testament_audio.pdfIn PDF document text
    • http://wugibawiwimaf.epizy.com/leo_de_borragem.pdfIn PDF document text
    • http://nopalikafafoba.rf.gd/razaleradosewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d5e958-1825-432a-b6c9-e8b31db5199e/how_to_read_resistor_color_code_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/css_corp_technical_interview_questions_and_answers.pdfIn PDF document text
    • http://lubagolole.rf.gd/jack_reacher_book_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333c3763-211c-4fdd-8b36-f17c0cec52d6/dd_wrt_router_wifi_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1223a9c-2505-4687-8298-5df079a3bb99/piwosajari.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_off0000d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 5004 bytes
SHA-256: 030741f41ec3051c3b7d6abc5c0845af8309f874ddfe8167e0281223b4286231
font_01_sfnt_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 10060 bytes
SHA-256: c9f13d347870305283b34303932579ec9daea0f71f8192e8c3dad03b4e3d0538

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