Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4b60eda0798d1c…

MALICIOUS

PDF

72.2 KB Created: 2021-02-28 15:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 31d3a5f2ae5d3fabf01e0cca41b499fe SHA-1: eb982aae78aa4e99bf03aeebac491b4c8d181a1c SHA-256: ac4b60eda0798d1c44dabac611f09f3f74d381d3ffd68a916810f1efa6e52dc0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=total+gym+1000+abdominal+exercises In PDF document text
    • https://cdn.sqhk.co/jifegusewe/XiafKgc/gixusus.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/pianista_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/ig0wBgx/pesexomanurazafunoru.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/aWOLs1X/29577261802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_6013942fc6a49.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/62205442968.pdfIn PDF document text
    • http://familyit.pro/27685552157ox2qp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_60179a64e1c08.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/68290256435.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/ihgivgj/amazon_kindle_app_for_samsung_tablet.pdfIn PDF document text
    • http://summer-italy.fun/hodder_igcse_physics_workbook_answers8kpyg.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hahdjia/11888574292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_601764ac074af.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/95464436708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mitefunigesito.rf.gd/bytefence_license_key_2019.pdfIn PDF document text
    • http://libigik.rf.gd/how_to_turn_on_american_messaging_pager.pdfIn PDF document text
    • http://mepojijolotezud.rf.gd/employee_appraisal_questions_and_answers.pdfIn PDF document text
    • http://gonapubofolok.epizy.com/portrait_shading_techniques.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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 5712 bytes
SHA-256: 5ee4c1256b29c7d8f27fcddde4ab1975b3a9c1ac5d512b8596859343bbbbbb99
font_01_sfnt_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 10240 bytes
SHA-256: 22c72695770e499f97429cc71a2410fe382dee384ce811e56ff43c1ae3819838