Malicious PDF — malware analysis report

Static analysis result for SHA-256 640d662ca88992ff…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 08:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8939896170330ca167cda0018b6a5091 SHA-1: 952b9ba5cef43d7c0ebd8c48634fcbacad9fe4c5 SHA-256: 640d662ca88992ff7770ab70573b21fc54d24ad4a83dca6513e858adbc539fb3
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://druttle.ru/award?keyword=how+to+multiply+and+divide+mentally PDF link annotation
    • http://vefipitop.22web.org/samsung_galaxy_s9_uk_used_price_in_nigeria.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/xamolepejadivir.pdfIn PDF document text
    • http://dejenenipanoz.22web.org/spreadsheet_match_two_columns.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/gjfEyPP/margherita_pepperoni_pizza.pdfIn PDF document text
    • http://my-favshopd.online/kivaxenidigulejosesexo7ek82.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/netuzifowikibogupufo.pdfIn PDF document text
    • https://guxemufisi.weebly.com/uploads/1/3/2/7/132710659/9116403.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/3978170.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/mogipegi/nothing_else_matters_acoustic_guitar_tabs_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/persona_5_confidant_gift_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/19775390251.pdfIn PDF document text
    • http://mukaxasapezaw.rf.gd/tok_presentation_example.pdfIn PDF document text
    • http://lavowatovodab.rf.gd/32048371027.pdfIn PDF document text
    • http://xuvufajozurez.rf.gd/ansys_acoustic_tutorial.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_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 5048 bytes
SHA-256: 142df0c4f54339f5c4963e536d3efca0bc245b020758f9fc923eecb18e9747e8
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 10528 bytes
SHA-256: 34054a9f15808fb3ab3f2ea08f09e5f3d6f7ded15ba782c5ad81723eb06afa0d