Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ffed83cb333368…

MALICIOUS

PDF

76.1 KB Created: 2021-03-18 18:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4e0e4a2daf72f8f29f95be5902388934 SHA-1: fcb53e57c4abc57324afe168336237f9f36610db SHA-256: 14ffed83cb3333684f96106f3e21346e7a19baef1a6265398a4777174b5478b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a primary one pointing to 'baarspo.ru', suggesting it's designed to redirect users to a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=ceratite+pigmentar+em+c%25C3%25A3es+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5fcc7080881b7.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • https://bunikesetula.weebly.com/uploads/1/3/0/7/130739723/wigegemugazimikid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463528/normal_602da4c455cee.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/fdf1407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_60503c19bd10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_60504384cb61b.pdfIn PDF document text
    • http://wekeb.space/kawebusetelaludhpj2.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ugTPSha/20791751314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_5fec3223e2acf.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/6gjifw4/nail_salons_near_open_late.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/dcXvsii/gfx_tool_for_mobile_legends_mlbb_early_access.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/7761vjE/guide_for_stick_war_legacy_apk_day.pdfIn PDF document text
    • http://table-wait.com/vinadhue86.pdfIn PDF document text
    • http://servempieza.site/el_infierno_de_dante7a917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_60371919325fb.pdfIn PDF document text
    • http://sandiego-podcasts.com/curso_para_aprender_ingles_desde_cero_gratisy8c11.pdfIn PDF document text
    • https://zazewefagawi.weebly.com/uploads/1/3/0/7/130776698/5ed363.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/1979486.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/66b7eefe-9e7f-4147-8faa-ef640c0fb59f/46914067339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eba1b52-16cd-4bf0-ab43-1f6e70451e2d/49143346251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8463a232-1af6-40f9-944f-8818871c70df/fijelomevexapub.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_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 5664 bytes
SHA-256: 0f501123d556c7f3544acf5bd07bab81e629542c63ee8811fcd08601648504a0
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 12432 bytes
SHA-256: b07aed934051f00f2fce2f3b09d9f780706e4f3c511b8295bf1ff52c9a0b7122

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