Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd5358b366d41c7…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 03:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9faa81256229592370f2eeb7ed3233e5 SHA-1: e5663a91ba8baf27a7fb0a6be33db983a75f538b SHA-256: 7bd5358b366d41c7021cfdca56f155dfeed4cec8ea3b5cbc907e3cc79c024886
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://pelibifir.ru/strik?utm_term=is+american+journey+dog+food+good+for+dogs PDF link annotation
    • http://car-test.pro/77436573077ptvkw.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/0iifGKc/winner_soccer_evolution_apk_mod.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/65769000525.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/emOrihj/shark_attack_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/bid3je3/61280836692.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/77897886655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fd97f8c3ad0f.pdfIn PDF document text
    • http://zijiwox.iblogger.org/medical_abbreviations_and_symbols.pdfIn PDF document text
    • http://salearea.pro/20235963859368l5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/pazapivuzi.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/tasajukexabubo.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/red_date_tea_cooling_or_heaty.pdfIn PDF document text
    • http://mebofubanu.rf.gd/printable_free_equipment_rental_agreement_form_template.pdfIn PDF document text
    • http://fosixijikalapi.epizy.com/insulin_pump_therapy_guidelines_for_successful_outcomes.pdfIn PDF document text
    • http://rasezufolob.rf.gd/variety_show_korea_2019.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/xudojenumekep.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_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5424 bytes
SHA-256: d6363eb818abe0c3900074c3979662bff11ef8d015a289a4c7b0b80283dc3f52
font_01_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 11292 bytes
SHA-256: d622a4f96dfb85342100a84566c9ec083f313234f63b08472793f125c9b4f05d

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