Malicious PDF — malware analysis report

Static analysis result for SHA-256 884af704c7f8cf6d…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 17:37:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01d1b0de6f2cf6280158a1469b3dcbe7 SHA-1: 11175a0b2f94130eeb2bbd76e6a550bf051195d5 SHA-256: 884af704c7f8cf6d6cc78a33162726ab36adf1f203e43fffff7cd9c9bbac15c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as game-related content. The primary lure appears to be related to 'Coin Master' game hacks, directing users to the URL https://netcdn.xyz/app/406889139/how-many-free-spin-links-is-there-for-coin-master-game-hack. The presence of a download button lure further supports a malicious workflow, likely leading to further malware or phishing attempts.

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/how-many-free-spin-links-is-there-for-coin-master-game-hack In PDF document text
    • http://cornerstonedurham.com/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://cornerstonedurham.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/100-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/earn-free-robux-on-roblox_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_003_off00004792.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4792 24944 bytes
SHA-256: 88447787b7a2ecc10a45ce5957992b9380b63c45a10c27ed52a94b568cc4604e
font_01_sfnt_off00008038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8038 18564 bytes
SHA-256: 570b0c61311575f79f3042bd24f9f673b4866dc3d196f598a36d155a291d7be6

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