Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d07c59779b2172…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 20:24:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8ebeae464e4b5d15c79c0b267f7768c2 SHA-1: bab6516b72449915ac8f2ca9eee56cf8218e7214 SHA-256: 53d07c59779b21722b172fa9f3fc40e178f6eb40515154a1790bbe4f51ef1fbd
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically 'http://netcdn.tw/app/406889139/coinmasterdailyfreespins-com-game-hack'. This lure, combined with the 'password-protected archive handoff' heuristic, suggests the document is designed to trick users into downloading malicious content disguised as game cheats or related tools. No scripts were extracted, but the overall pattern points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coinmasterdailyfreespins-com-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/freemoblie24info-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-sin-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-play-games-for-free-descarga_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/village-coin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-login-and-password_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-it-isint-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacking-websites-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/stickmasterluke-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/2021-coin-master-hack_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
stream_002_off0000370e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x370E 23144 bytes
SHA-256: 865d060180c150f2f6cb18c460cd171a49fc655176563d658b89e92504519c73
font_01_sfnt_off00006b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 18696 bytes
SHA-256: ce456eb17f2db1915b327d416d1e6d0ed8e1fdec420ac0cee82ca000bfaa5c3f

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