Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba91b08c83f2e49b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 17:16:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ddfd067720a3adcaf59e823a38fa3de2 SHA-1: f5f8094395f2fc28cef8ce0f12f2289bda7af396 SHA-256: ba91b08c83f2e49be193079bc292822830ac78c4927256508defca5be7ba3fe7
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free game hacks and cheats. The primary URL, http://netcdn.tw/app/406889139/coin-master-cheats-free-game-hack, is identified as a lure for game-related exploits. The document body and heuristics confirm the intent to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-cheats-free-game-hack In PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/hackear-roblox-gratis_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-free-free-robux_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-roblox-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-no-serveys_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-grand-theft-auto-v-cheats_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_off0000309a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309A 22892 bytes
SHA-256: a1f3f268413ac9be56a891625fbdc9145037ce134ca3d017c2255f4ea5b46d26
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 18164 bytes
SHA-256: 55eaa8c39803c9dd4095fb3a7b9e7181ae88cc5bd7376e23fd82d846a3866298

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