Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db98bd90535ffd3…

MALICIOUS

PDF

97.0 KB Created: 2021-03-18 03:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b3ddd5bda120b807ee64ebc8adf9fb03 SHA-1: f3f907ad40053c332542afaafb66b081503dbe96 SHA-256: 0db98bd90535ffd3b9c5616e2c4cd1762c9474acfa759e3a9b0970262219a5a4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure and a link farm. The document impersonates a cloud service, presenting a deceptive download button to trick users into clicking external links. These links lead to numerous disposable domains, suggesting an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://soxebez.ru/award?keyword=edit+pdf+files+online+without+installing+any+software PDF link annotation
    • http://gojevomarokabe.getenjoyment.net/zewejigisumubezise.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/jgsg6jh/photo_lyrically_ly_video_status_maker_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwogoxozoxi/feiagc9/93809741548.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/41142647222.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/bd434ed.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/27167915479.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/sadalan-guzozufelowivis-fibawega-pomadotu.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/MiiWogg/cartoon_video_cartoon.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/teacher_attendance_sheet.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/sotoselafepemixe.pdfIn PDF document text
    • http://dikagowoxi.sportsontheweb.net/laboratory_instruments.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/vokegajatugodukovozuzirin.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/vefetizadinokujivo.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/android_studio_tutorial_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/dhjihqv/lovely_pets_game_reviews.pdfIn PDF document text
    • https://sovonasu.weebly.com/uploads/1/3/1/4/131407222/jesoxazisovo.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/57956308927.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/80882594074.pdfIn PDF document text
    • https://lekakuvikel.weebly.com/uploads/1/3/1/3/131380005/diwilanajimiwebav.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/fubarobexasozelerenawi.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/gst_annual_return_form_9_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/iegcnvn/zigzag_ou_zig-_zag.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001246e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246E 5452 bytes
SHA-256: e0c50c243560b54e6473993bdc3ccbb42a9d57c6d3ea9f825e84ae6b44e87c35
font_01_sfnt_off00013715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13715 12000 bytes
SHA-256: f10cbff758d688dd3f117f82a7c2fa9148710a6fca6065f5de100a54f0027b97
font_02_sfnt_off0001601a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1601A 16292 bytes
SHA-256: f1478bb26d0b7a6dae51ac8e15955a8e418175fadd9fbff247db063992d412eb