Malicious PDF — malware analysis report

Static analysis result for SHA-256 202c23614bf23816…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 05:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 87ad782e63127ce9c72a826ae5d705ae SHA-1: da21a2b0dd67ab2b9242786c4a6dd12be5f4db84 SHA-256: 202c23614bf2381626370e0b0f125d18b0ff22af91fdb41fe8fe3ff9d35be58c
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/avatar-roblox-game-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/roblox-robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-jailbreak-cheat-codes-pc_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/new-2021-roblox-exploit-hack-superskidv1_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-use-a-script-hack-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/www-free-robux-win_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-robux-hack-generator-2021-november_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/murder-mystery-free-online-games-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-printable-valentines-cards_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-apk-hack-mega_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-script-roblox-build-a-boat_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/utiliser-cheat-engine-sur-roblox_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
font_00_sfnt_off0000301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301D 21876 bytes
SHA-256: 15fe159c4d8b7052c5d31355e84c36b1506e7304771ec1cc46162f5f9dbe8261
font_01_sfnt_off0000604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 18964 bytes
SHA-256: 1379943476da574a4dab6a8d7032cbe9a71a66405b07e4af99d26083a0ac37fd

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