Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ce370ffbee1c23…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 06:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 89ee817b41e3913cd66755aa6d88fb99 SHA-1: 53baf1ac6cd49356c3866764d9601ac31f10e8a2 SHA-256: 43ce370ffbee1c238ec234edb2fa997ac2cbf7c6ab3eaa5b746d1f9b6b78a0a5
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 0.9832

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 https://netcdn.tw/app/431946152/free-robux-gg-redeem-codes-game-hack PDF link annotation
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-hack-sketch-on-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-no-verification_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_004_off000051b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B6 29104 bytes
SHA-256: 9f9d2c86b3ecba66743bdf1c6e478ed7f34d7605fadbd970eeb7158eb320a22f
font_01_sfnt_off00009512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9512 18736 bytes
SHA-256: 4c74299278bc14a077e911fb8861e570dff6f66697843173083fa85ded102345

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