Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1bc9aa6d220352…

MALICIOUS

PDF

71.7 KB Created: 2021-01-18 11:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0af4e0414ffc6d422dd826ff4d1c02c9 SHA-1: 18de6a329ca7e7240f75e357eb1d8c8abdacab01 SHA-256: 8c1bc9aa6d220352244063d3ef7ffdb9fb897575de8d7480e8f72d92749b1d0c
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jottigo.ru/aws?utm_term=uc+browser+app++java+9.+5 PDF link annotation
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/demixosiwawumag-xugij-vuwawusotirul.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/jijicCO/electronic_components_list_and_definitions.pdfIn PDF document text
    • https://site-1258062.mozfiles.com/files/1258062/pivozusi.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/474fac4d1c1.pdfIn PDF document text
    • https://site-1179689.mozfiles.com/files/1179689/49650971319.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/temitironef.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/dshghyz/48670370174.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/xerafumubufebeken.pdfIn PDF document text
    • https://site-1181076.mozfiles.com/files/1181076/wild_wolf_simulator_3d_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/bhbijhe/top_50_petroleum_engineering_universities_in_nigeria.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/0hh82gf/slide_away_miley_cyrus.pdfIn PDF document text
    • https://site-1175525.mozfiles.com/files/1175525/85741891843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/mizuzosubefumizexolem.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/66041790949.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/befipulododoxakigisujon.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_off0000db55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 5568 bytes
SHA-256: 00de9efb37d54bb230ba2d684bf263eacac6eb5e9b44b267e9e3b98e7f6bc1b9
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10560 bytes
SHA-256: 1914aa9757378b74ad7042c847599ee74b0fc33819f60103104923aecd1b92b5

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