Malicious PDF — malware analysis report

Static analysis result for SHA-256 0452a60d37f3ca15…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 10:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fa3a16e1ade3b048b2f4a3f26d948643 SHA-1: 22e846434c9bf886de55da5094556ede74a09b86 SHA-256: 0452a60d37f3ca15f202103d75ccb772280e7930bb205cdb751c4d434a22eb02
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a lure for game hacks and free spins, directing users to a suspicious URL. This suggests a social engineering tactic to entice users into clicking malicious links or downloading further payloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.co/app/406889139/coin-master-free-spins-and-free-coins-game-hack PDF link annotation
    • https://kupinapopust.mk/pub/img/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/50-free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-game-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/robux-hacking-code_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-admin-commands-hack-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/dungeon-quest-free-account-roblox_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/mc-the-miner-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-free-robux-hack-no-generator_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-without-human-verification-on-phone_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/ben-10-roblox-free-games_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-guest-shirt-free-2021_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_off00002fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC1 23432 bytes
SHA-256: 78855645b8548f8cedbf9b187beb7c3a4c9bbcd307c3344e05cb39835c38c479
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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