Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c864c59f28c710…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 10:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 322f53abf29631a3a725ed84bce26f2a SHA-1: 8b9c72f9ae036d1247ef1c85cb22ab33eb8f3b4a SHA-256: d3c864c59f28c710ed18adeab1c40b663d4af96ff7699b5755b678eef2f6b562
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://seumenha.ru/123?utm_term=personal+financial+statement+template+pdf PDF link annotation
    • http://finomimetafix.sportsontheweb.net/aprendizajes_clave_ingles_secundaria.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/rukulezibirar_mukokiloture.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/Rqgajha/14091035385.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/309f2.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/introduction_to_philosophy_classical_and_contemporary_readings_7th_edition_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gojaxaxiwa/hjZgfhc/realistic_gun_sounds_app.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/digital_electronics_projects_for_engineering_students.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/hclZNgj/69483360840.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/82305118083.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/1401557.pdfIn PDF document text
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/9c1d8.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/jigZEjb/lapedudobuzifizivag.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/cellular_respiration_activity_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_062899480ef9421dadbe62117d8ba0cb.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_1fbbdfde1370461dab198f5b2909e55a.pdf?index=trueIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_07fe822c960a4d54bbd988e5f55eb74b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b162c861-6237-4991-9b60-2e919963b96e/40163442524.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/rabonifetelojudukuwufovif.pdfIn PDF document text
    • https://83c30a2d-d83c-4020-88f4-fdb7bed8c9e2.filesusr.com/ugd/e59e18_7553de71e15e4b47b9c5035cd9283b39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bf6ae7-f1e5-4115-9982-148f4976833b/sovutipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2be56ce-63b5-4864-9f69-26842f8ad6dc/91486470776.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/advanced_excel_training_in_urdu.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/beveridge_report.pdfIn PDF document text
    • https://f3215690-35ba-4bce-915f-db1a6f912a1b.filesusr.com/ugd/d32599_99f90d02d92c481abeee1bbcf2935a78.pdf?index=trueIn 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_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 5300 bytes
SHA-256: eeeca00787cea9157d9f793619dd3a64a20ef42416caa0d7b1a1afcf384e59ff
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 10604 bytes
SHA-256: 602e3211ab972be9a0a5b3fe09a75160294d2a1cfc120d706d9edab011dae150