Malicious PDF — malware analysis report

Static analysis result for SHA-256 f645deb6e9811188…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 13:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bc1a3080e05a44ec25c989fe73058c99 SHA-1: 49253b9400214de672a3460303e7b5f99d401030 SHA-256: f645deb6e98111882149ee84d1c57d916151db39ab1e77adb79ac86105f3c27e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting a deceptive lure related to a 'Bihar b. ed syllabus 2020 pdf' to encourage users to click on links hosted on disposable domains. The primary goal appears to be directing users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/award?keyword=bihar+b.+ed+syllabus+2020+pdf PDF link annotation
    • http://sesizuxewewax.mygamesonline.org/25754384216.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/value_of_education_file.pdfIn PDF document text
    • http://wusozupu.mypressonline.com/tabuzuw.pdfIn PDF document text
    • https://zukudanasoxe.weebly.com/uploads/1/3/2/8/132815154/popejagevedila.pdfIn PDF document text
    • http://chempion.coffee/12816278711icsaa.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/30343119510.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/twilight_breaking_dawn_part_1_full_movie_watch_online_fmovies.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/administracion_financiera_de_los_inventarios.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/understanding_augmented_reality_concepts_and_applications.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/65056039446.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/5248965656.pdfIn PDF document text
    • http://dressnbuy.com/samsung_mini_split_air_conditioner_troubleshootingkchz4.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/18555656874.pdfIn PDF document text
    • http://optarfes.com/49143514649bbxli.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/e6920.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/jonudexedup-wapuke-bekaw-fekidugozik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowimifefezujo.myartsonline.com/basic_medical_terminology_prefixes_and_suffixes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d0702d-d0cf-4dc1-86c7-24c56af799c1/34039556125.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/72419940881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a314a11d-ac29-4463-8394-999eeaa3f925/how_to_set_meeting_in_google_meet.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_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 5724 bytes
SHA-256: 1648cf83889399707e27b5bea1c353b73531a3e03acc9d8b78fe2fc631e9173e
font_01_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 10688 bytes
SHA-256: 63846406247829bc9603c84e8616afb3940bb9a657846be319b824e3bfbf993b

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