Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac87aa24a9f03787…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 07:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ce0a3e5be706894a9f63fc259ddcfca SHA-1: 23e092f2b9726fb5fb3049a106b0cb96a9b0333d SHA-256: ac87aa24a9f03787956ae5fb456404ffb020cbcad5076928cc6e502e23c33081
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=pebble+steel+watch+band+replacement PDF link annotation
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/90e7babc5c11e84.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/lepewimetemu.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/gjrjaT8/40192272499.pdfIn PDF document text
    • https://cdn.sqhk.co/nadizolobe/YsgTPie/65283622918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_6012784a80bd1.pdfIn PDF document text
    • http://sofuwabafa.iblogger.org/fagasisomukog.pdfIn PDF document text
    • http://bufizuz.22web.org/gamit_adivasi_rodali_song.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/silenudefa_dodewez_gejetinunar.pdfIn PDF document text
    • http://fosuxevudutuviv.22web.org/domugadesekanifit.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/xefezesebusu/95920984022.pdfIn PDF document text
    • http://sumewapedujevi.rf.gd/kiwinodosonopukux.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/holiday_activities_vocabulary_worksheets.pdfIn PDF document text
    • http://viromumixemet.rf.gd/61366965943.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_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 5544 bytes
SHA-256: 2ed4b3af003a8dd77604e955368c3e35ed30a4f73636fb035f40612c38a73e70
font_01_sfnt_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 10280 bytes
SHA-256: 20f575e25d7b6bc1a5880114aac4b7fbc0274934323a398e48f670c705c9c851