Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed6531ad3c4d769…

MALICIOUS

PDF

71.5 KB Created: 2021-02-06 02:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8f31a48533f1a164872366aa02517695 SHA-1: c2fcc096c3eb4d63792552429ecabb4323892a9e SHA-256: 6ed6531ad3c4d769a0b38c00b92bed57e92fb9e427b02af784bb9d336933d56c
136 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wb?keyword=how%20old%20are%20you%20answer%20in%20english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fd39b7ba7134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fe46666301c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_60142610e13c3.pdfIn PDF document text
    • http://stepka2016.xyz/2674831292047r02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5fcd2801b4047.pdfIn PDF document text
    • http://1freedom.space/math_123_sjsu23sq9.pdfIn PDF document text
    • http://icub.tech/zepujoz2us7h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fdd5f6ed077b.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/sakamegamuzizexodafkhsz.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/viromibukoleliw/68199744509.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/42373140783.pdfIn PDF document text
    • http://femulupir.rf.gd/audacity_macbook_air.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/reference_letter_template_for_college.pdfIn PDF document text
    • http://tuwelifijija.rf.gd/gigadixixekufumilule.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/bam_bam_bhole_ringtone_pagalworld.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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 5240 bytes
SHA-256: f8f383c8e43228e6d48130f1c94035b1d71b8a1b5b4f874aa1012ecd24614cc1
font_01_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 10408 bytes
SHA-256: b8a178501f8d4e5e261a87d4a22628365a6601fad559d311caf548340471df52