Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3ef1bbce025e0d…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 13:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5cac72b1f6991384fd24f718b4865a52 SHA-1: 06d1c79b6cbd78b79437cb6020b75fd0b7201db2 SHA-256: ad3ef1bbce025e0daf2bd43cfe67e3b931a3ef0b7f004888e3ec1acfa93190c6
126 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
  • 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/wix?keyword=instrumentos+de+cuerda+con+sus+nombres PDF link annotation
    • http://itanah.space/ditulujosixamoxikawogexfs7ax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5ff4a663f2e9c.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/dPvwDhh/zetomiredodutetevibupi.pdfIn PDF document text
    • http://leopards.space/flight_outline_clipartd1zgx.pdfIn PDF document text
    • http://creditreportusa.info/android_10_releasennb7c.pdfIn PDF document text
    • http://argo-tourism.com/elements_of_statistical_learning_hastieati6j.pdfIn PDF document text
    • http://shortsomfj.space/30101831580s21my.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/where_is_the_filter_on_my_samsung_top_loader_washing_machineb23ri.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/kifutizijebuj/76151005276.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/aleks_lesson_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/gilgamesh_pronunciation_guide.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_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 5128 bytes
SHA-256: 8b199ac992c7ccc82948b7fe20c099aa8bf4eccc838d76a40ff59a7e817b839e
font_01_sfnt_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 11344 bytes
SHA-256: d2b6417c78d7dc546756970486e99695e2bfc1c3b279b0b318c4fc03611b1a6c