Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a64bc25ceea68fd…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 14:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7bb613181cc00832861b0613cfbe3e24 SHA-1: 21c9ce0fd3c87589a174cf01d2ad3e6ace16a5dd SHA-256: 1a64bc25ceea68fde92b03ee26516bdcab05b0679e942c517c4c6fb16aa1d840
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.co/app/406889139/free-coin-master-spins-and-coins-game-hack PDF link annotation
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-sunset-city-how-to-sell-furniture-no-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-catalg-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/robux-free-no-survey-real-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-no-human-varucashe_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-be-a-hacker-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-walk-through-walls-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/auto-clicker-for-roblox-mac-2021-free_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/robux-free-password_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-cards-200k_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-script-hacks_GM431946152.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
stream_002_off00003408.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3408 23088 bytes
SHA-256: 730ef3e0d803a39c0b3637dbd57aefd580f84afdbd2380b35f20664d048beaf6
font_01_sfnt_off00006819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 18348 bytes
SHA-256: 413415c914cf3d685700639dfc58d8cf1fe3a335bb6d031630b58f909af9418a

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