Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e61d0436a3ef477…

MALICIOUS

PDF

71.5 KB Created: 2021-02-06 09:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ee42496019909e2535bade5f84856798 SHA-1: 0c466dfb3a411ef9900ac6e029aeb8ef8e37c891 SHA-256: 5e61d0436a3ef4776eea10c243291d8d01d3d7d03c4e51b7fa6222a65292a8e9
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=maplestory++game+client In PDF document text
    • http://winsl.space/16867486004ok081.pdfIn PDF document text
    • http://tonagruz.ru/autocad_2018_macaad0y.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/32993.pdfIn PDF document text
    • http://igonlinesupport.com/lucid_dreams_keyboard_sheet_musicsbhl7.pdfIn PDF document text
    • http://vodoroding.info/citation_machine_chicago_manualnorif.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2J2rsjw/4518800005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fd822e2b19a3.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/2lABheq/free_music_for_youtube_videos_app.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/324964.pdfIn PDF document text
    • https://zanijiwudiv.weebly.com/uploads/1/3/5/3/135349447/wivemarapakesa.pdfIn PDF document text
    • http://itchia.space/capacitor_across_transformerhd355.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/pafexegud/ponigimijurifuwakamot.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/25296046385.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/express_in_cartesian_form_calculator.pdfIn PDF document text
    • http://gazinopalevigem.rf.gd/bph_treatment_guidelines_nice.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_off0000d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 5360 bytes
SHA-256: 75d52a827182d9f129766b928e3c2792eff9efef36e6599f090dbb8e2d4cba78
font_01_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 11156 bytes
SHA-256: 633b5ebd28d9264ca5407c82f351fc4d9209e0ff3f4d3a80631219dfa98b7e02