Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c84f293ebff5671…

MALICIOUS

PDF

82.0 KB Created: 2021-03-27 09:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0204a36094997be5d59214541fa28ba SHA-1: b028e83213c7b9aa3b34fbb8f014d607260325d6 SHA-256: 9c84f293ebff567110f0d4d1ee868c4263c2d0baa46e4f6c972f03c957353795
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://dugedepap.ru/wix?keyword=town+of+new+lebanon+ny+election+results PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451927/normal_60443ac03a0e5.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/gazizenotuwabaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6011ecba2899d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_604f3ba96a995.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/antennas_and_wave_propagation_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379733/normal_5ffcaa0f0b900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_602e250557791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_60553383a5bf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_604a03287d830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzakema.onlinewebshop.net/briggs_stratton_generator_manual.pdfIn PDF document text
    • http://mewaleb.rf.gd/arany_jnos_toldi.pdfIn PDF document text
    • http://sasumejexijow.rf.gd/mabegelugegefa.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/behind_the_scenes_at_the_museum.pdfIn PDF document text
    • http://namezenidel.onlinewebshop.net/fupidopijuw.pdfIn PDF document text
    • http://peworesafasar.epizy.com/scalability_and_stability_in_performance_testing.pdfIn PDF document text
    • http://futoriw.epizy.com/54443384606.pdfIn PDF document text
    • http://kigasuwixiw.epizy.com/positive_and_negative_effects_of_globalization_on_economy.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/adverse_event_reporting_fda.pdfIn PDF document text
    • http://pasumogebono.rf.gd/triangular_distribution_formula_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/episode_guide_ncis_new_orleans_season_2.pdfIn PDF document text
    • http://mikesivu.rf.gd/berserk_1997_soundtrack.pdfIn PDF document text
    • http://pofavokazaf.rf.gd/t_fal_clipso_pressure_cooker_manual.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_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 5156 bytes
SHA-256: a52b7a0d14d606c2a7ab68c29ed4ba4faa40ca02a75570b768c919f2e9e9da62
font_01_sfnt_off000112ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EA 11416 bytes
SHA-256: e78f3a16bd96953415878934426f2d4aa09ede817b21d0232624cc7029dd8b26

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