Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffdbd35d117b1c2…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 22:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67d5f4a2b6317beb7c90a951369683e3 SHA-1: 63b78a6330e7cdf6e9b399e5f3426f01121fba0f SHA-256: 9ffdbd35d117b1c208fa0f8ac7ff7b019afc8fb8513afc4458dc3604d75df385
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/earn-free-robux-on-roblox-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-noot-noot-hack-roblox-id_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-how-to-make-your-own-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-money-on-tower-of-defense-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-codes-w018_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hack-site-roblox-unlimited_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-someone-on-roblox-and-steal-theyre-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-email-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-hack-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/tiktok-free-gas-hack_GM835599320.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-coin-master-spins_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_off000031a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22292 bytes
SHA-256: 1859665a47829129db6fd31b36f004d8edf3cee269c58e9e5b2714a3afad0e58
font_01_sfnt_off0000633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633F 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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