Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b313ec301a63a4…

MALICIOUS

PDF

66.1 KB Created: 2021-02-15 22:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6c6a2b2495d65dc7c3569be37fd488ed SHA-1: dc7e6546568eb5195262c2650d9f8988e3f6c6ad SHA-256: 11b313ec301a63a43cd0e21154b5bd6e3374fac05ceb4813c1faa863f28b9b4e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/wb?keyword=the%20story%20and%20its%20writer%20ann%20charters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5ff02ac846f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_600dc18212334.pdfIn PDF document text
    • http://hookup157.fun/button_onclicklistener_androidnq2ik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_602ab988bb705.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/gjhehf5/kuxafivifizutiduvaxusapa.pdfIn PDF document text
    • http://beststudent.fun/kovuzibaqv24h.pdfIn PDF document text
    • http://fruit-ita.fun/53738660303syb3.pdfIn PDF document text
    • http://counterman.ru/wenujivaruvagaretexamuwidon18z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_6028359ca2763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novoniranalisa.epizy.com/google_plus_sign_in_android.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/99150424723.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/chitika_meeda_chitika_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/java_8_cheat_sheet.pdfIn PDF document text
    • http://safefimij.epizy.com/string_format_number_2_decimal_places_c.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/waxumidu.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_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 5140 bytes
SHA-256: 796c7731404efbdbc1847f2f841076ae7f7babb876fbfacdd597bd839aedd8d9
font_01_sfnt_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 9720 bytes
SHA-256: 0b89cb84fc7395eb618917df1d114ce5357abf0ebb1034138091fcab2ba57b3a