Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ba0da06eb2ee10…

MALICIOUS

PDF

69.1 KB Created: 2021-02-25 23:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5fbc1a85016c40e894749e5e73bd5931 SHA-1: d474e28241c93667056800d887b363f3016dd3c2 SHA-256: f0ba0da06eb2ee10861401d35eeba22bd1cc5a1b75ea837b7cd5c1c04bf4fb3a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=toro+personal+pace+lawn+mower+hard+to+start PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5fee9b34a06b6.pdfIn PDF document text
    • http://pasetbs.xyz/brochure_template_powerpointyss6k.pdfIn PDF document text
    • http://2220202.ru/24090231162thwaa.pdfIn PDF document text
    • http://barekokodigak.iblogger.org/camscanner_full_apk_2019.pdfIn PDF document text
    • http://tehnopolis.org/can_routing_number_be_used_for_international_transferje1rk.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/dupebutedepi.pdfIn PDF document text
    • http://nuzofofe.iblogger.org/wediguwitov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_602a579d2875c.pdfIn PDF document text
    • http://predouche.xyz/eats_shoots_and_leaves_punctuation_marks1hrzj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_6016d01f60aa2.pdfIn PDF document text
    • http://xupogete.iblogger.org/51116700023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5fcad7919e8de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nonakiwobituk.rf.gd/eco_friendly_house_project_report.pdfIn PDF document text
    • http://wobosososozase.epizy.com/inside_the_artificial_kidney_machine_worksheet_answers.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/durekev.pdfIn PDF document text
    • http://majoxokusixapav.epizy.com/belmont_care_home_cqc_report.pdfIn PDF document text
    • http://bamalupit.rf.gd/16211081814.pdfIn PDF document text
    • http://tokumizexafu.epizy.com/nerajalub.pdfIn PDF document text
    • http://repefewuvu.epizy.com/biotic_and_abiotic_resources.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C0 5092 bytes
SHA-256: ead7e155a3b0d40f5989103991fc0808d18124e45ea7a6a78b04fdc2fde9e62a
font_01_sfnt_off0000d5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 10244 bytes
SHA-256: 4b7d4cb3a07272e20dfd506e793a7c72212bd861390811125037c469d23c7674
font_02_sfnt_off0000f908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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