Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26b23e720bf799d…

MALICIOUS

PDF

71.8 KB Created: 2021-02-17 10:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d8da59f307cd8f2d692ec06f5f13e6d3 SHA-1: b1cc9e0fa066e0aac47f9cb936cf15ebcb5d22f5 SHA-256: c26b23e720bf799d42ae3f1a7bf4f00012ff8632f6202e6601c0de34cd7294d5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=murray+mower+deck+installation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5fddaaca2818e.pdfIn PDF document text
    • http://topdiscount.pro/xmas_party_invite_templatesubgj2.pdfIn PDF document text
    • http://fb-pageunderreview.com/algorithms_and_data_structures_download69w4m.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/94f71936.pdfIn PDF document text
    • http://lianhua.life/91616351201i278h.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/575cac3.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/lilojovarevopaj.pdfIn PDF document text
    • http://kyponnik.online/gunoxie9nzi.pdfIn PDF document text
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/d04fb4b3a1f8.pdfIn PDF document text
    • http://daating19.site/tuxomotebq2ywz.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/6242869187mcbny.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/tokunawexexix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getakufo.epizy.com/charlie_s_angels_tv_show_episode_guide.pdfIn PDF document text
    • http://podixevobelataw.rf.gd/the_art_of_seduction_top_tips.pdfIn PDF document text
    • http://perorudo.epizy.com/game_crash_bandicoot_gba.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_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 5348 bytes
SHA-256: 7fa9473d57ab3ff5b5f931afe3931fef8b55acecb885b72cb5149b9621ea4aa5
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 10836 bytes
SHA-256: 02b74e1719f5cc7d9962d7c85cb5a501266eebdd90afc8d0845ed8a4823e978c