Malicious PDF — malware analysis report

Static analysis result for SHA-256 273735b8f966c0f2…

MALICIOUS

PDF

72.5 KB Created: 2021-02-18 16:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8c440578e971533e9b330fbbe9076429 SHA-1: 9f70c1e0234867adb3569c7b16e47aa244f3d5e6 SHA-256: 273735b8f966c0f279509637f851307a675fa5def86c7d4f9535fd366ce3655e
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://jacksth.ru/wb?keyword=how%20many%20cigars%20in%20a%20box%20of%20romeo%20and%20julieta PDF link annotation
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/lawod_biniganam_mopegexuvo_duwomi.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/djbcBif/54046011446.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/gcBBJji/steam_table_in_si_units_free_download.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/mezipogifu_jebumija_pavux_lijujatozamitew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fd1725027122.pdfIn PDF document text
    • http://kumadogeka.22web.org/logical_framework_analysis_example.pdfIn PDF document text
    • http://bestcreditcheck.info/revajusokorije50dtn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_5fd61a64542ba.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/9464432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5fcc5cd42c893.pdfIn PDF document text
    • http://study-english-02.space/sg_cricket_company_full_formu91ox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5fcd50f1017e8.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/chfVgei/princess_libby_little_mermaid.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/wazetafewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodefojabotozij.rf.gd/english_connectors_exercises_with_answers.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_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 5780 bytes
SHA-256: d1c448fc1a3f7925a00d496b396bded3a2754abfe2cfb8bf6dee2b3fa9ba6330
font_01_sfnt_off0000f208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 10152 bytes
SHA-256: 981e690bffa710466653462bd419c4d61892b9ca832e0b47af408f869b2f8174