Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a214cde9d747f1…

MALICIOUS

PDF

45.8 KB Created: 2021-06-04 04:24:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 72f9ae902aa1ae8b98741277e81f3cd0 SHA-1: 3bb6c44cc2333ccec28e05b76bfefd43c5957992 SHA-256: d8a214cde9d747f1a35e615b867d19d27e720ef26e4f9452a8e157e053457490
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to external websites promising game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs suggest the document's purpose is to redirect users to potentially harmful sites.

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.online/app/431946152/free-robux-wheel-game-hack PDF link annotation
    • http://librarysenior.com/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/pokemon-go-free-meltan-box_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/pubg-uc-2021-trick_GM1330123889.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master_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_off000050a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A5 28612 bytes
SHA-256: 6b971f0d17f8002482dcdab53966576f02ce635770e6c2ef73f4871bdb198076
font_01_sfnt_off0000904a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904A 18452 bytes
SHA-256: 2e7982e98076b23ded81992615fd9156783bf43ce379c6908e3793bc8f10067b

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