Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdb0da495646e11…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 04:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a27e4a6d8a5fde4245bc1de534b03d0d SHA-1: c661dc2ba570612d239b7df476f5b53fa87b5663 SHA-256: dfdb0da495646e11b0e0187cd5f51cb57ecb1a8c8d624a50ba35b8167d1125c8
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 0.9864

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-one-piece-final-chapter-hack-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-give-free-robux-to-friends_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/como-hackear-roblox-2021-en-android_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-promo-codes-april-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-hack-for-coin-master-2021_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_004_off000050d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D4 26088 bytes
SHA-256: 7ab7fc18079d1e68b83aedd688e4f64845638419fe984ce0509b6b399932bd7a
font_01_sfnt_off00008c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C55 19068 bytes
SHA-256: 8d2c8dcc1004c5b9001a317d235123d00b8e5947e57e0d905c4741374512c686

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