Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef4dd38f2a94912…

MALICIOUS

PDF

38.4 KB Created: 2021-05-15 16:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b724c5fb412dc5d8c37455f076ae9b2e SHA-1: 4f4b82ca48fbeaebde54e90d960e6d57f6d86143 SHA-256: fef4dd38f2a94912b7d069693b4c493aaa8c10795a4c190d2c513f2aed4ef160
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically promoting 'Coin Master Hack' lures. These links are designed to trick users into downloading further malicious content, likely leading to exploit execution or malware download. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9438

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-hack-without-verification-2021-game-hack In PDF document text
    • http://gingerscience.co.in/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://gingerscience.co.in/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gingerscience.co.in/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://gingerscience.co.in/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gingerscience.co.in/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://gingerscience.co.in/images/roblox-royale-high-diamond-hack_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_off00003c5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C5F 23964 bytes
SHA-256: c4bc32a48879531be2e5653abd9bee7b5edc932357c43530438b9b8d91d9cefc
font_01_sfnt_off00007321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 18756 bytes
SHA-256: 1f8069b8e373c1677ee696ae61803aee5e0941708a1ef93a03d88c08535d6ef3

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