Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c10a2361883581…

MALICIOUS

PDF

79.8 KB Created: 2021-02-02 07:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b6b7db2da36796e592bef855e560c565 SHA-1: dba63a59b84a9d3083579bac58f3e1400fc2d7d4 SHA-256: a4c10a236188358124b9cd22ffabd56f85897579922e48ee4e9bd61be1bd92df
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=brookdale+hospital+medical+record+release+form PDF link annotation
    • http://stakingyfi.com/dolphin_browser_pro_apk_modbckcd.pdfIn PDF document text
    • http://aycotoro0.xyz/libro_28_creencias_delos_adventistashpplb.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/uniformly_accelerated_linear_motion_observation.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/4idgelA/i_wish_grandpas_never_died_lyrics_video.pdfIn PDF document text
    • http://help-business-media.com/school_bus_demolition_derby4f7lg.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/w7thiib/35075610319.pdfIn PDF document text
    • http://mon-cmbretagne.com/sap_business_one_accounting_moduleabej3.pdfIn PDF document text
    • http://comforfemj.fun/ear_infection_symptoms_baby_nhs05el5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_6018db41e4078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_5ff4b28d5c97e.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/zaredi_jowow_zilibakuvojap.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/vibuvomomuv/safativemi.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/financial_accounting_manager_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/75322725116.pdfIn PDF document text
    • http://jolasesiv.epizy.com/avg_antivirus_software_for_pc.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_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 5508 bytes
SHA-256: 68599fa18b47820b45b8b723f15b1bc903d63a35414649263c0850d6c825b353
font_01_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 10800 bytes
SHA-256: 49f9915bc63b82358164a7e5a2a17eccf6006788ff62b9bf582a0c2ff29f20e4