Malicious PDF — malware analysis report

Static analysis result for SHA-256 647fb4720c697f3a…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 17:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf0f08f996322ae52e8890d0210196c1 SHA-1: 374267276759c701b70e35d0a65718c0e0125ea9 SHA-256: 647fb4720c697f3a99552cd3a06ea633c45af6e8ea4f131024e9f7c8283c8c38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors, disguised as "game hacks" and "free spins" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based attack, likely intended to lead users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/where-can-i-get-free-spins-for-coin-master-game-hack In PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0E 24584 bytes
SHA-256: 8bda02b9a0b35d16ae18ca65b1c9abac2ed222e3d0d7e453847aeabdcb8cbec2
font_01_sfnt_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E44 18248 bytes
SHA-256: 8779a24c74e66c23b33121dd1a71955adfc2f322ab09b0870da4a74651533123

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