Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74ab0a3c4c7dbad…

MALICIOUS

PDF

74.9 KB Created: 2021-04-09 21:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7233910bbf031702b4f2c64c205cebd1 SHA-1: 2eb9bd3ef249531b39e0c426eeb89beda189314e SHA-256: f74ab0a3c4c7dbad4a1049d6785ff66be5a6bc29dcbbbf841fb957cbdf741162
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=can+you+play+dungeons+and+dragons+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5fd89b16e6d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6062dd0ebdb15.pdfIn PDF document text
    • http://naturapple.space/hitron_router_default_login_cgnm-22504jrr5.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/acls_pretest_2015k0iuz.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/4350753.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/5890872.pdfIn PDF document text
    • https://boliwarabinobe.weebly.com/uploads/1/3/1/4/131437394/7425770.pdfIn PDF document text
    • https://tipidaxu.weebly.com/uploads/1/3/0/7/130739537/8954674.pdfIn PDF document text
    • http://onlinesos.tech/lezavolagukwrxt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_602230ee53292.pdfIn PDF document text
    • http://1xbets-regs.site/pentair_kreepy_krauly_parts_listw619v.pdfIn PDF document text
    • http://kernig.pro/tojivimapep9t9fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7210a226-7be0-44b6-a986-b5309be1634a/pusez.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/tonawarakosezibadofoxexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a774789f-7a6f-4bf2-93c8-89dd41641c0f/tujole.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/94479211060.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/daily_activities_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/9704611189.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/lord_of_the_rings_trilogy_blu_ray_extended_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/93551522988.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_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 5132 bytes
SHA-256: 071ce84c8bc1b559ed3d09141fdb5980d740e759303d1f517ede6a21095d7d77
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10548 bytes
SHA-256: f75c881aebee39632ff3afc0f93aba56870384252aa5b9aad698a1a78fb9e43c

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