Malicious PDF — malware analysis report

Static analysis result for SHA-256 4357c64991553bff…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 23:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e57f5c39580953a5f98cec4cf075cb75 SHA-1: a863ad2b2dd73bf2a75f94dfbf4a5cc48e7a4135 SHA-256: 4357c64991553bff6eae1a76e6ec6452444c8ebae4434eca017cc9b2c851a47e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and hacks. This suggests the primary goal is to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

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/406889139/coin-master-free-spins-apk-2021-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/pubg-uc-generator_GM1330123889.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_off00005634.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5634 25880 bytes
SHA-256: f977197414ad4085f1011e6ab34ba3bb339d787cfaf05e39d8fa79cdc4bdd72d
font_01_sfnt_off0000916c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 18456 bytes
SHA-256: 29cdb33c079fef0813399b5d3456e0cee6bb382532089b205a8c189028fb290e

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