Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b80f38a51e4771…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 22:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ebd51d26f241cb187171c7d41dd07e43 SHA-1: 7d6502cffd0723011d7a91eaf746b389ee9d95f1 SHA-256: e8b80f38a51e47712dcc2a12d84717d667d3e6e8e4ffa54b42b2ff9f2a296896
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirector lure, directing users to malicious infrastructure. The document body, though partially corrupted, contains references to 'Coin Master Gameplay' and a URL associated with game hacks. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/406889139/coin-master-gameplay-game-hack In PDF document text
    • https://zabota-kashira.ru/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://zabota-kashira.ru/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://zabota-kashira.ru/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/get-robux-today_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-free-gold-cards-link-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_003_off00004975.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4975 25020 bytes
SHA-256: 140bd0933e6e43e0256bcf4827cae8fbea814b9c49ad8dfaf2d7ab56e6b682cf
font_01_sfnt_off000083ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 18236 bytes
SHA-256: ad3c54622fe5860f441fa157cfd09fdd7391131bf21229add7d3bdfc0c26f4fb

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