Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f419cfe87be975…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 04:56:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 84e166c381562d5014a1e579effc5d06 SHA-1: ef51e099d1c827fe473a4acdbbc27f9643cc5fe9 SHA-256: 40f419cfe87be975f89e9a28ea05d983ae448cd9ef647102dbe14f6d76acb2fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering game hacks and free in-game currency, such as 'coin-master-free-spins-2021-link-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures indicates a social engineering attempt to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to trick users into visiting malicious sites.

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/406889139/coin-master-free-spins-2021-link-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-obby-easy_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/pokemon-go-vs-free-fire_GM1094591345.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/broken-bones-iv-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-rewards_GM431946152.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_off00003198.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3198 22680 bytes
SHA-256: 38fbeb59f335f31fd9ff0d8c77e82cce9fada2593374dedb2aa8ee6f8d645422
font_01_sfnt_off00006443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 18748 bytes
SHA-256: 6b7b5c220d016c3aab9a29df09f0685746ba519b9135bec2949d8532d766281f

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