Malicious PDF — malware analysis report

Static analysis result for SHA-256 16401b70a0a22504…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 07:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f83d04833b118576ea20268b8907686f SHA-1: 6e1ba27f6b2b1886c6a9625a2ce8748108d2e43d SHA-256: 16401b70a0a22504168f731dd5d69057ddd3bf7a5ec6d64b721910cf14f2639e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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+stop+alarm+clock+from+blinking PDF link annotation
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/vowedi-jogobuwumoz-nakulabaxatav-takebovuxav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc94fe303349.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/gcHijsL/ballroom_dancing_shoes_online.pdfIn PDF document text
    • https://wifadesar.weebly.com/uploads/1/3/5/3/135345928/wuwelozawitilaw.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/dggKihH/soxuxore.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/ojdxNZ4/drift_away_uncle_kracker_ukulele_chords.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/sugajuwuxexojekese.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/jdh7giq/clicker_heroes_hacked_unblocked_unlimited_gold.pdfIn PDF document text
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/84d6c84291630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5fdb77a4ab935.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/3275852.pdfIn PDF document text
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/retew.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/37862128307.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/6XxjfLr/vikings_season_7_episode_12.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/pigopatojugujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/xorenuxuwonemuxewidaso.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/35357247406.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/80185424450.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/fimivukakizeduzuvanu.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_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 5592 bytes
SHA-256: 814e1cd66b7c04a0bb0590eb007922668375d13dbe7fa4e907662e2e268b7a46
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 10732 bytes
SHA-256: fbe76c2998469f041962603955762a48ae7e7dbf21fe8c5dfdfa51fc4d56257c