Malicious PDF — malware analysis report

Static analysis result for SHA-256 391b26de61a0bdc6…

MALICIOUS

PDF

71.1 KB Created: 2021-02-18 07:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 266c13302fe0dfa2ac1872a6710496b1 SHA-1: 41c39bdd480ac055d6dbe4d12a4959891a1e6839 SHA-256: 391b26de61a0bdc6afa7dc68e32afc4cb39f6a72ca2aa6e407d26403c6290bed
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=maytag+neptune+front+load+washer+service+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467601/normal_602a7e6164670.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/XAhchhY/celebrity_voice_changer_app_cancel_subscription.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/korax-zomixovurid-megufo-kaxofevexazovag.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/5557dae3aa6.pdfIn PDF document text
    • http://iwhite.space/dirigifixjnrt.pdfIn PDF document text
    • https://manadazalivufud.weebly.com/uploads/1/3/4/3/134358645/7375110.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/linuxasitibajut.pdfIn PDF document text
    • https://cdn.sqhk.co/peporewav/0uCXXrQ/best_zombie_shooter_games_xbox_one.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/aea0783.pdfIn PDF document text
    • http://nukels.xyz/labunefirepulajinmvdfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nemebikox.epizy.com/11238471306.pdfIn PDF document text
    • http://tavupovasar.rf.gd/banyan_tree_3d_model_free.pdfIn PDF document text
    • http://betiravel.epizy.com/pencil_animation_software_for_windows_7.pdfIn PDF document text
    • http://vazavaxajude.rf.gd/96237387814.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_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 5828 bytes
SHA-256: 240f3e4c7bc131caaf11fce189e0760f30fdd21e9aa786b19deaef30bf7d160c
font_01_sfnt_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 10440 bytes
SHA-256: 40f12f4b13ab41a8b5db7035270675ab5cd1e0deda6d668d9131a04da5034509