Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b1d9e04512a614…

MALICIOUS

PDF

94.2 KB Created: 2021-03-17 00:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88095b390c6fc30c0c6eaaeb5e175d29 SHA-1: 19e9803e38ec1865511251aef424e5a8f1012d02 SHA-256: d4b1d9e04512a614a7ec7b22aa433bbdc24636033735c7789acca86e07f71afb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that appears to be a lure for downloading an application, as indicated by the 'kodi apk download for firestick' keyword in the URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure point towards a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=kodi+apk+download+for+firestick
    • http://kalowodopole.mygamesonline.org/11496882290.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_6036ffccc4bb0.pdf
    • http://wejuzofibab.medianewsonline.com/danujebatowudamujaser.pdf
    • https://cdn-cms.f-static.net/uploads/4450898/normal_6022ce4fce7a4.pdf
    • http://zonerokemub.getenjoyment.net/23282573612.pdf
    • https://cdn.sqhk.co/gapirofi/HRThcjb/dunifemak.pdf
    • https://cdn-cms.f-static.net/uploads/4493195/normal_6042d7f6ed52b.pdf
    • https://cdn.sqhk.co/bupewazadufa/GihFhj4/general_cable_conduit_fill.pdf
    • https://cdn.sqhk.co/madufuxenuw/OgiOhgG/apple_music_vs_spotify_vs_amazon_vs_pandora.pdf
    • https://cdn.sqhk.co/xitilesuxiw/erhhico/dirt_bike_racing_gear_for_youth.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lebejos/kisarubuxabak.pdf
    • https://s3.amazonaws.com/luborinizu/42675965400.pdf
    • https://s3.amazonaws.com/bidurudilidujug/41101480291.pdf
    • https://s3.amazonaws.com/pusixa/the_foggy_dew_sheet_music_piano.pdf
    • https://s3.amazonaws.com/tojazudibumogab/all_that_is_solid_melts_into_air_shakespeare.pdf
    • https://s3.amazonaws.com/tosevud/1-100_chart_in_french.pdf
    • http://buzumigasox.myartsonline.com/31676425425.pdf
    • http://kepofif.onlinewebshop.net/how_to_read_23andme_results.pdf
    • https://s3.amazonaws.com/pafexegud/at_command_tester.pdf
    • http://vilatelisoto.onlinewebshop.net/do_any_rivers_in_the_us_flow_north.pdf
    • http://seroroxunabolu.onlinewebshop.net/argumentative_essay_samples_for_high_school.pdf
    • http://saluwagasa.onlinewebshop.net/fagina.pdf
    • https://s3.amazonaws.com/nijosinizo/vmware_workstation_14_full.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001325f.bin
9e3252f447140b8875f46674e80659f75e763a9e0bbbbd581299cf70cf51bac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 5276 bytes
font_01_sfnt_off00014478.bin
3ffea96bc684e6154ec8bc3d49de19d3152ee317a4d9d3cdad7d032f946b008f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14478 11432 bytes