Malicious PDF — malware analysis report

Static analysis result for SHA-256 f713bea3e5752176…

MALICIOUS

PDF

38.5 KB Created: 2021-05-22 13:52:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ef8578640ed89ae0aab069f6d34e590a SHA-1: 4465f364b9bdd72b385d24804a3a74deb16455f4 SHA-256: f713bea3e5752176f4ad410770a54dd8354a5c28bb1c40f5812d29a0c03346a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, promising free game resources like 'Coin Master Free Spins' to entice users. It contains multiple links, including a primary one to a known malicious redirector infrastructure at `https://netcdn.xyz/app/406889139/coin-master-free-spins-today-daily-links-game-hack`. The document body also contains numerous other links to domains like `kukuck.de`, which likely serve as further stages of the attack or host additional malicious content. No scripts were extracted, but the presence of malicious links and the lure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-free-spins-today-daily-links-game-hack In PDF document text
    • http://kukuck.de/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/near-tiktok-free-view_GM835599320.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AE 24116 bytes
SHA-256: 410b74ffbc47670b6b3a879cb1342443d16c92e8a0bada1c89149caa58e97d71
font_01_sfnt_off000069c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000073b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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