Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac20945c1f10d30c…

MALICIOUS

PDF

72.9 KB Created: 2021-01-11 01:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: ed249329d54ca0f66326184c82bfceeb SHA-1: b99837d0862b88fd21ce715bc20f9016155edcc0 SHA-256: ac20945c1f10d30c036c0b4ce80db39d023553e448e0a3a4253394da1e658520
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/wb?keyword=acc%20football%20championship%202019%20charlotte PDF link annotation
    • https://site-1173632.mozfiles.com/files/1173632/vuvaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422367/normal_5ff54162f007e.pdfIn PDF document text
    • https://fokakumunimu.weebly.com/uploads/1/3/4/2/134266115/nuxavanobibimu.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/gcAxhgg/rumalobo.pdfIn PDF document text
    • https://zilibadokaji.weebly.com/uploads/1/3/2/6/132680781/lofogoruji_sifedivuzoduwo_razapi_nixowafumote.pdfIn PDF document text
    • https://site-1179300.mozfiles.com/files/1179300/sisamunojobibozazoroxiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8943b7174fb.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/7321b68e3a1a.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/YLXgN56/31592621608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5f90dd7404e46.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/ggihAgf/91989122882.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/bjeihgC/52573954800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fa6ee3f1d160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_5fb3651a98184.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/vulodosutugobepa.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_off0000de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 5868 bytes
SHA-256: 36756eb79c39b4e74bb7983007b22cdf7a20169e33b78286dc6d8d70163db53d
font_01_sfnt_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 10732 bytes
SHA-256: 3b8d0dc82e5ea5ad1aa76fa1963d4a15846b55fb79bee82230b1562d34980bfa