Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26402acc00e61ac…

MALICIOUS

PDF

75.9 KB Created: 2021-03-15 17:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a40ec761cdf68d598537c05e5e04c632 SHA-1: 56e0e2da2354d5a43e4bed25631edb61f93461ef SHA-256: d26402acc00e61ace2c2cea82fce7ba9caaa66c5bd30d7e26947d4675bb6486c
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://pelibifir.ru/aws?utm_term=how+do+i+know+if+my+oven+igniter+is+bad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387433/normal_60171b3336777.pdfIn PDF document text
    • http://small-italy.space/64210153822yho9y.pdfIn PDF document text
    • http://tonagruz.ru/national_common_core_standards_performing_artskc0ao.pdfIn PDF document text
    • http://3203epworthcres.com/21386320922wuw0i.pdfIn PDF document text
    • http://klyshsheff.xyz/69154413201lif6m.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/the_fallen_movie_review.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/4931853.pdfIn PDF document text
    • http://securityverifiedservices.com/shrimad_bhagwat_gita_hindi_freebw5r5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_6004a54b8ffc2.pdfIn PDF document text
    • http://harkateine.fun/pimp_iceberg_slim_audiobook_free91u1m.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/80658879652.pdfIn PDF document text
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/vofigasosev.pdfIn PDF document text
    • http://9gusevshop.space/sarafakizadefekunuv2g1q.pdfIn PDF document text
    • http://bathforlegs.xyz/molesirureji6gu1.pdfIn PDF document text
    • http://fsbsiod.com/lazarillo_de_tormes_tratado_1_temasun5ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fc6a16fe4210.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/kegubinefuda/reinforced_concrete_design_to_eurocode_2_seventh_edition.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/42679065574.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/1734_aentr_series_b_manual.pdfIn PDF document text
    • http://penobugixova.atwebpages.com/analyste_financier_banque.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/95230430853.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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5616 bytes
SHA-256: c70e3860a4f2f47a5909742ed370354efe5304c36f0aef20166585b476ec5c9d
font_01_sfnt_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 11432 bytes
SHA-256: eb392107517151b4a6b295ca22113f9587fab56eaecb78d25cb4150d8fdd93e0

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