Malicious PDF — malware analysis report

Static analysis result for SHA-256 016a1397bd9a41c7…

MALICIOUS

PDF

48.4 KB Created: 2021-06-08 23:16:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f3237a7410b5382938d9902486ea3f81 SHA-1: 1b7da13e90df90ea6d953d48c9fbc0d3eaf1fc6d SHA-256: 016a1397bd9a41c71b70217d5ae76899069ac4b8dcab53e82aec12e428402900
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 0.9796

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/roblox-mechacubes-hack-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000528b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528B 26600 bytes
SHA-256: e878def3fcdd1297a943936c96f962cdb1f6f69a6b162b69f287ace0a4a8662f
font_01_sfnt_off00008f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 2900 bytes
SHA-256: 6998d46388f638dd30759c16876d00fa52d995d70c0b0272e3a3cb9921b82a85
font_02_sfnt_off00009972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9972 18684 bytes
SHA-256: df8936dea9c7b845d879237d2676738e8a21d7693b58933c8d2aa8a3a89f5545

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