Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006e2542b1d3bf7…

MALICIOUS

PDF

78.4 KB Created: 2021-02-04 08:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3d142ac94ff6b7952dd5faa4f735eeb4 SHA-1: c1a2ef56494a2c8a2a256fd3f268c9b0207b27e9 SHA-256: c006e2542b1d3bf714c26ca38d806f967fac598cbce0f9517b69d07f1db5e3ef
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 one pointing to a disposable domain ('zivuneko.epizy.com') and another to 'jacksth.ru' which is likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to 'Star citizen lore team' and the authoring application, suggesting a lure to entice users to click on the malicious links.

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://jacksth.ru/123?utm_term=star+citizen+lore+team PDF link annotation
    • https://cdn.sqhk.co/ledusefugize/bieUmdg/24968670152.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/dKiePRt/nazinogu.pdfIn PDF document text
    • http://witexodegimo.iblogger.org/usda_ppq_587_form.pdfIn PDF document text
    • http://vostokzapad.su/784610243132w6li.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/eVYXpCn/business_plan_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/fiechvC/sad_ringtone_music.pdfIn PDF document text
    • http://believes.space/descargar_libro_pon_el_cielo_a_trabajarp6u0v.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hcWgeZu/reposteria_dominicana_en_orlando.pdfIn PDF document text
    • http://healthytrands.com/zuma_deluxe_apk_download_for_pca0ffo.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/HiiKijf/voruf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivuneko.epizy.com/xatanasunesovixedubepefon.pdfIn PDF document text
    • http://tiworetaganufo.epizy.com/crichq_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/chaal_jeevi_laiye_gujarati_movie_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/single_letter_cursive_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/carry_on_jatta_2_okpunjab.pdfIn PDF document text
    • http://jatujij.rf.gd/16182480913.pdfIn PDF document text
    • http://nomekerileme.epizy.com/mezukekukazidog.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_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 4920 bytes
SHA-256: 8ddfe0df80dae7c5a1a67cc1559cd37c9ae91341788a1f5bfb3bd17df4f07371
font_01_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 10924 bytes
SHA-256: 7d82c34f177c89be07b93fe1cf36f1cc4d4377d8f84fac5e99eb9d11b399de09

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