Malicious PDF — malware analysis report

Static analysis result for SHA-256 f387f32d36c556ca…

MALICIOUS

PDF

69.9 KB Created: 2021-02-12 15:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b939804ef098bffa0d3f05ecd8b80ded SHA-1: 903ce8466fca720598eaca67da1c204070acc5ec SHA-256: f387f32d36c556ca1cf9fd5d33b3ab4cb6ad6f74da649ad121ed1e4f257bdf07
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://jacksth.ru/wb?keyword=occupational%20safety%20and%20health%20iti%20book%20pdf PDF link annotation
    • https://cdn.sqhk.co/tunuviju/Zn1ia1b/66388463521.pdfIn PDF document text
    • http://yandex-delivery.cc/gakujazivimeofpe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_60186bac17b69.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/gIsHgi8/nubofulobukuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530429/normal_5fe427eb9a313.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/ahdLhej/castle_of_illusion_full_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/jZ5gdV6/hide_seek_movie_2010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5ff262548d99c.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/fNifyjg/lewibidu.pdfIn PDF document text
    • http://medesutaduj.22web.org/suara_burung_cililin_gacor_panjang.pdfIn PDF document text
    • http://bajuzupur.22web.org/everyday_mathematics_grade_3_volume_2_answers.pdfIn PDF document text
    • http://weramixizagob.22web.org/27920297394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6010c6006a80c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xupapuxonoxun.rf.gd/zozovajojevo.pdfIn PDF document text
    • http://sipopos.epizy.com/armageddon_movie_in_tamilrockers.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_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 5480 bytes
SHA-256: 8af206c33fe3da5db94bcfccb3759b8a0c281fcd19e93840e2250dbafd505839
font_01_sfnt_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 10520 bytes
SHA-256: 623319cb19e3b47e2e2279f6785cb61c38201b96af8fd2bc0704d0c006119b27