Malicious PDF — malware analysis report

Static analysis result for SHA-256 4588da1a7c41646e…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 12:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d3c3bbb568d54f671b97cc899b486190 SHA-1: 4954792e1b347a6bbd677b413b98a0e48fb2f83a SHA-256: 4588da1a7c41646eee35c2a86aa2a7c9d76ed7e76207517e308bc4ad49137a47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/431946152/free-robux-generator-no-survey-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-hack-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/op-rewards-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-robux-hack-2021-working-version_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-prevent-free-model-hack-for-roblox-sudito_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D5 22720 bytes
SHA-256: ea6b8ad2c74a297c4174f39ab332395ae9954cf87386934f2fbd396a958cebe3
font_01_sfnt_off000063e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E5 19112 bytes
SHA-256: 33dfcb2d47e73eef9736d676cbbc8a7ec86e5e18ee4675d0e02e08c00d2a765b

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