Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92393ac5c365d7c…

MALICIOUS

PDF

63.9 KB Created: 2021-02-14 17:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f14d0a3a5645b3f82ab05c00efd5181f SHA-1: 66677b85485452d0b5fdf9b113c7a94d55dbfbd9 SHA-256: a92393ac5c365d7c859091cf256c5499c1cf2b1ac53a166433d7af26e005a6b9
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://leonvi.ru/wix?keyword=7.5+practice+b+geometry+answers PDF link annotation
    • https://bopupuvi.weebly.com/uploads/1/3/1/6/131636777/d791958ff3.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/bgiXMgf/aladdin_and_the_king_of_thieves_wikiquote.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/c420092d2ca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_60067a848b08e.pdfIn PDF document text
    • http://fruit-ital.space/gideon_s_trumpet_movie_answer_keyykhxf.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jTVbVhg/free_football_games_download_full_version_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369168/normal_5ff32ea4eb666.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/tadafives-kolajixone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_5fd7676d4110b.pdfIn PDF document text
    • http://bigmagazin.xyz/chloroethane_staggered_conformation_point_groupxrmkp.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/gikerosek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421336/normal_60037ca4d793c.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/mojeretunafa_sezedazeb_vuvexomek_xugomuponaxax.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/poxikatetitumux-sogut-zumejolisinu-vifemejuta.pdfIn PDF document text
    • https://gebezemimubitup.weebly.com/uploads/1/3/1/0/131070169/9faab68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7D 5696 bytes
SHA-256: f7af8997a1787aec1e5ef5227a6d40354a970e3874b13cce8c7635d1584a0961
font_01_sfnt_off0000d1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EC 9696 bytes
SHA-256: 9a74810568f1fd3c43dd6ef74407674a14214dc1cf6fe76e5218c6c0acba8477

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