Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29fa76359c443c5…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 05:58:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9a6c0875bdafc0b4bcc5cbeaafdbef6 SHA-1: 89a2a476d5f97bb1c2a0fc80778242c3091215da SHA-256: c29fa76359c443c52eadc132baa1f1158eb28bac86da215bdf3174bf7fdc7952
160 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a game hack redirector lure, specifically pointing to a URL associated with malicious infrastructure. The document body and embedded URLs reinforce this, advertising 'Coin Master Hack 2021' and other game-related cheats. This suggests the primary goal is to trick users into visiting a malicious site that likely serves a second-stage payload.

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-hack-2021-ios-game-hack In PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/roblox-admin-commands-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/roblox-admin-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-400-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-hack-money-in-urbis-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/infinite-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/add-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-hack-spin_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_002_off00003097.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3097 22796 bytes
SHA-256: e8ca3cfe08cc26b83dcb6f82160754e0ca74a7926b8d594872a856ed3195cee5
font_01_sfnt_off000063e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E2 18408 bytes
SHA-256: e909f45242a9fd0be6739d7b47574e2ac84d9da9f41b4bb4c7d450081742910c

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