Malicious PDF — malware analysis report

Static analysis result for SHA-256 885997f307453ffc…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 08:48:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 412cdd5a0fb1d264d82c5ce3ae80adcd SHA-1: 8fa4f5b57913110553a68454f588f342dfe39574 SHA-256: 885997f307453ffc67205c5b073fb4ce80b02b30ea6e6dcc21232fe1632efdc9
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free game passes on Roblox, directing users to a suspicious URL. Heuristic analysis confirms this is a game hack redirect lure. The ML classifier also flagged the PDF as malicious with high confidence. The primary IOC is the redirect URL which likely leads to a further stage of the attack.

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/how-to-get-free-gamepasses-on-roblox-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-chains-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-personal-information_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-fire_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-obc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.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_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 22524 bytes
SHA-256: d3c52d54d0882c7662aa010248ef140e9e0f0c7e21236d7a81b4438cc4b73a2b
font_01_sfnt_off0000633e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 19356 bytes
SHA-256: c4896df15a0e6a62920d63d504b7f77c5e25ec731e2dd301a46ee6934e748c38

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