Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2ee8653ec777b5…

MALICIOUS

PDF

75.4 KB Created: 2021-05-02 09:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b0b5f23b31bab1bf76cb981ff6173bae SHA-1: df2d4f3e9e4f12f3de8f4facaa38aff3264b2bbd SHA-256: 3d2ee8653ec777b5e283de34887b4928f0568fbb2d916a0aefc17ecd9ec1da55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=axxess+aswc-1+manual+program PDF link annotation
    • https://cdn.sqhk.co/misumirotoj/2iabjib/38199532359.pdfIn PDF document text
    • http://lumurezekosarew.66ghz.com/when_we_dead_awaken_adrienne_rich.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/ashton_sanders_wu_tang_clan.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/bigokukanuf/ifPFGgc/68530564564.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/hIijmBA/42866611988.pdfIn PDF document text
    • http://cardioactiveuficiale.site/6567487888se7bp.pdfIn PDF document text
    • http://checkmyscore.info/22828915067j00xv.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/3P8BXzg/fashion_braid_hairstyles_salon-_girls_games.pdfIn PDF document text
    • https://cdn.sqhk.co/tipadasa/ji1dU6E/85178371460.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/sunset_portrait_photography_settings.pdfIn PDF document text
    • http://masalev.ru/kevejny3na.pdfIn PDF document text
    • http://pop-marketplace.ru/43769315413jwcms.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/bejikefowu/monsters_a_bedford_spotlight_reader_first_edition_edition.pdfIn PDF document text
    • http://sozofini.epizy.com/sifokevakipe.pdfIn PDF document text
    • http://xogowiv.epizy.com/lowekezogirifenavawakiwu.pdfIn PDF document text
    • http://munakazoxan.epizy.com/faxebewakununizo.pdfIn PDF document text
    • http://gexovudin.rf.gd/heat_of_combustion_magnesium_lab_report.pdfIn PDF document text
    • http://bidadaweba.epizy.com/keloid_and_hypertrophic_scar.pdfIn PDF document text
    • http://pubopebiwofaz.epizy.com/72987148888.pdfIn PDF document text
    • http://xaligapuk.epizy.com/kadek.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/anemia_ferropenica_etiologia.pdfIn PDF document text
    • http://vulajasazibu.epizy.com/wafanededivefexeru.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/autogenes_training_bungen.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_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5488 bytes
SHA-256: 063d98977f3af06c993dafefb70185ab863bb45327c729045b821d185b4f1504
font_01_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 10436 bytes
SHA-256: 044ba1e2a2a889ae44a1cabcd6e63c65382ffef6a63a5f62b482d57b4142a9e5

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